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EXHIBIT 5.4

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PREFERRED SECURITIES GUARANTEE AGREEMENT

MCN Financing III

Dated as of March 19, 1997

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TABLE OF CONTENTS

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ARTICLE I
DEFINITIONS AND INTERPRETATION

SECTION 1.1 Definitions and Interpretation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

ARTICLE II
TRUST INDENTURE ACT

SECTION 2.1 Trust Indenture Act; Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SECTION 2.2 Lists of Holders of Securities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SECTION 2.3 Reports by the Preferred Guarantee
Trustee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SECTION 2.4 Periodic Reports to Preferred Guarantee Trustee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SECTION 2.5 Evidence of Compliance with Conditions Precedent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SECTION 2.6 Events of Default; Waiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
SECTION 2.7 Event of Default; Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SECTION 2.8 Conflicting Interests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

ARTICLE III
POWERS, DUTIES AND RIGHTS OF
PREFERRED GUARANTEE TRUSTEE

SECTION 3.1 Powers and Duties of the Preferred Guarantee Trustee . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
SECTION 3.2 Certain Rights of Preferred Guarantee Trustee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
SECTION 3.3. Not Responsible for Recitals or Issuance of Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

ARTICLE IV
PREFERRED GUARANTEE TRUSTEE

SECTION 4.1 Preferred Guarantee Trustee; Eligibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SECTION 4.2 Appointment, Removal and Resignation of Preferred Guarantee Trustees . . . . . . . . . . . . . . . . . . . . 12

ARTICLE V
GUARANTEE

SECTION 5.1 Guarantee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SECTION 5.2 Waiver of Notice and Demand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SECTION 5.3 Obligations Not Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
SECTION 5.4 Rights of Holders . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SECTION 5.5 Guarantee of Payment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SECTION 5.6 Subrogation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SECTION 5.7 Independent Obligations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

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ARTICLE VI
LIMITATION OF TRANSACTIONS; SUBORDINATION

SECTION 6.1 Limitation of Transactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
SECTION 6.2 Ranking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

ARTICLE VII
TERMINATION

SECTION 7.1 Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

ARTICLE VIII
INDEMNIFICATION

SECTION 8.1 Exculpation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SECTION 8.2 Indemnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

ARTICLE IX
MISCELLANEOUS

SECTION 9.1 Successors and Assigns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SECTION 9.2 Amendments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
SECTION 9.3 Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SECTION 9.4 Benefit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SECTION 9.5 Governing Law . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

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PREFERRED SECURITIES GUARANTEE AGREEMENT

This GUARANTEE AGREEMENT (the "Preferred Securities Guarantee"),
dated as of March 19, 1997, is executed and delivered by MCN Corporation, a
Michigan corporation doing business as MCN Energy Group Inc. (the "Guarantor"),
and Wilmington Trust Company, as trustee (the "Preferred Guarantee Trustee"),
for the benefit of the Holders (as defined herein) from time to time of the
Preferred Securities (as defined herein) of MCN Financing III, a Delaware
statutory business trust (the "Issuer").

WHEREAS, pursuant to an Amended and Restated Declaration of Trust
(the "Declaration"), dated as of March 19, 1997, among the trustees of the
Issuer named therein, the Guarantor, as sponsor, and the holders from time to
time of undivided beneficial interests in the assets of the Issuer, the Issuer
is issuing on the date hereof 2,645,000 preferred securities, liquidation
amount $50 per preferred security, having an aggregate liquidation amount of
$132,250,000 designated the 7 1/4% Trust Originated Preferred Securities (the
"Preferred Securities");

WHEREAS, as incentive for the Holders to purchase the Preferred
Securities, the Guarantor desires irrevocably and unconditionally to agree, to
the extent set forth in this Preferred Securities Guarantee, to pay to the
Holders of the Preferred Securities the Guarantee Payments (as defined herein)
and to make certain other payments on the terms and conditions set forth
herein; and

WHEREAS, the Guarantor is also executing and delivering a guarantee
agreement (the "Common Securities Guarantee") in substantially identical terms
to this Preferred Securities Guarantee for the benefit of the holders of the
Common Securities (as defined herein), except that if an Event of Default (as
defined in the Indenture), has occurred and is continuing, the rights of
holders of the Common Securities to receive Guarantee Payments under the Common
Securities Guarantee are subordinated to the rights of Holders of Preferred
Securities to receive Guarantee Payments under this Preferred Securities
Guarantee.

NOW, THEREFORE, in consideration of the purchase by each Holder of
Preferred Securities, which purchase the Guarantor hereby agrees shall benefit
the Guarantor, the Guarantor executes and delivers this Preferred Securities
Guarantee for the benefit of the Holders.

ARTICLE I
DEFINITIONS AND INTERPRETATION

SECTION 1.1 Definitions and Interpretation

In this Preferred Securities Guarantee, unless the context
otherwise requires:

(a) capitalized terms used in this Preferred Securities Guarantee
but not defined in the preamble above have the respective
meanings assigned to them in this Section 1.1;

(b) a term defined anywhere in this Preferred Securities
Guarantee has the same meaning throughout;

(c) all references to "the Preferred Securities Guarantee" or
"this Preferred Securities Guarantee" are to this Preferred
Securities Guarantee as modified, supplemented or amended
from time to time;

(d) all references in this Preferred Securities Guarantee to
Articles and Sections are to Articles and Sections of this
Preferred Securities Guarantee, unless otherwise specified;

(e) a term defined in the Trust Indenture Act has the same
meaning when used in this Preferred Securities Guarantee,
unless otherwise defined in this Preferred Securities
Guarantee or unless the context otherwise requires; and

(f) a reference to the singular includes the plural and vice
versa.

"Affiliate" has the same meaning as given to that term in Rule 405
of the Securities Act of 1933, as amended, or any successor rule thereunder.

"Authorized Officer" of a Person means any Person that is
authorized to bind such Person.

"Business Day" means any day other than a day on which banking
institutions in the City of New York, New York are authorized or required by
any applicable law to close.

"Common Securities" means the securities representing common
undivided beneficial interests in the assets of the Issuer.

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"Corporate Trust Office" means the office of the Preferred
Guarantee Trustee at which the corporate trust business of the Preferred
Guarantee Trustee shall, at any particular time, be principally administered,
which office at the date of execution of this Agreement is located at
Wilmington Trust Company, Rodney Square North, 1100 North Market Street,
Wilmington, Delaware 19890, Attention: Corporate Trust Administration.

"Covered Person" means any Holder or beneficial owner of Preferred
Securities.

"Debentures" means the series of junior subordinated debt
securities of the Guarantor designated the 7 1/4% Junior Subordinated
Debentures due 2002 held by the Institutional Trustee (as defined in the
Declaration) of the Issuer.

"Event of Default" means a default by the Guarantor on any of its
payment or other obligations under this Preferred Securities Guarantee.

"Guarantee Payments" means the following payments or distributions,
without duplication, with respect to the Preferred Securities, to the extent
not paid or made by the Issuer: (i) any accrued and unpaid Distributions (as
defined in the Declaration) that are required to be paid on such Preferred
Securities to the extent the Issuer shall have funds available therefor, (ii)
the repayment price, including all accrued and unpaid Distributions to the date
of repayment (the "Repayment Price") to the extent the Issuer has funds
available therefor, with respect to any Preferred Securities presented for
repayment by the Holders, and (iii) upon a voluntary or involuntary
dissolution, winding-up or termination of the Issuer (other than in connection
with the distribution of Debentures to the Holders in exchange for Preferred
Securities as provided in the Declaration), the lesser of (a) the aggregate of
the liquidation amount and all accrued and unpaid Distributions on the
Preferred Securities to the date of payment, to the extent the Issuer shall
have funds available therefor, and (b) the amount of assets of the Issuer
remaining available for distribution to Holders in liquidation of the Issuer
(in either case, the "Liquidation Distribution"). If an event of default under
the Indenture has occurred and is continuing, the rights of holders of the
Common Securities to receive payments under the Common Securities Guarantee
Agreement are subordinated to the rights of Holders of Preferred Securities to
receive Guarantee Payments.

"Holder" shall mean any holder, as registered on the books and
records of the Issuer of any Preferred Securities; provided, however, that, in
determining whether the holders of the requisite percentage of Preferred
Securities have given any request, notice, consent or waiver hereunder,
"Holder" shall not include the Guarantor or any Affiliate of the Guarantor.

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"Indemnified Person" means the Preferred Guarantee Trustee, any
Affiliate of the Preferred Guarantee Trustee, or any officers, directors,
shareholders, members, partners, employees, representatives, nominees,
custodians or agents of the Preferred Guarantee Trustee.

"Indenture" means the Indenture dated as of September 1, 1994,
among the Guarantor (the "Debenture Issuer") and NBD Bank, N.A., as trustee,
and any indenture supplemental thereto pursuant to which certain subordinated
debt securities of the Debenture Issuer are to be issued to the Institutional
Trustee of the Issuer.

"Majority in liquidation amount of the Securities" means, except as
provided by the Trust Indenture Act, a vote by Holder(s) of Preferred
Securities, voting separately as a class, of more than 50% of the liquidation
amount (including the stated amount that would be paid on redemption,
liquidation or otherwise, plus accrued and unpaid Distributions to the date
upon which the voting percentages are determined) of all Preferred Securities.

"Officers' Certificate" means, with respect to any Person, a
certificate signed by two Authorized Officers of such Person. Any Officers'
Certificate delivered with respect to compliance with a condition or covenant
provided for in this Preferred Securities Guarantee shall include:

(a) a statement that each officer signing the Officers'
Certificate has read the covenant or condition and the definition
relating thereto;

(b) a brief statement of the nature and scope of the examination
or investigation undertaken by each officer in rendering the Officers'
Certificate;

(c) a statement that each such officer has made such examination
or investigation as, in such officer's opinion, is necessary to enable
such officer to express an informed opinion as to whether or not such
covenant or condition has been complied with; and

(d) a statement as to whether, in the opinion of each such
officer, such condition or covenant has been complied with.

"Person" means a legal person, including any individual,
corporation, estate, partnership, joint venture, association, joint stock
company, limited liability company, trust, unincorporated association, or
government or any agency or political subdivision thereof, or any other entity
of whatever nature.

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"Preferred Guarantee Trustee" means Wilmington Trust Company, until
a Successor Preferred Guarantee Trustee has been appointed and has accepted
such appointment pursuant to the terms of this Preferred Securities Guarantee
and thereafter means each such Successor Preferred Guarantee Trustee.

"Responsible Officer" means, with respect to the Preferred
Guarantee Trustee, any officer within the Corporate Trust Office of the
Preferred Guarantee Trustee, including any vice-president, any assistant
vice-president, any assistant secretary, the treasurer, any assistant treasurer
or other officer of the Corporate Trust Office of the Preferred Guarantee
Trustee customarily performing functions similar to those performed by any of
the above designated officers and also means, with respect to a particular
corporate trust matter, any other officer to whom such matter is referred
because of that officer's knowledge of and familiarity with the particular
subject.

"Successor Preferred Guarantee Trustee" means a successor Preferred
Guarantee Trustee possessing the qualifications to act as Preferred Guarantee
Trustee under Section 4.1.

"Trust Indenture Act" means the Trust Indenture Act of 1939, as
amended.

ARTICLE II
TRUST INDENTURE ACT

SECTION 2.1 Trust Indenture Act; Application

(a) This Preferred Securities Guarantee is subject to the
provisions of the Trust Indenture Act that are required to be part of this
Preferred Securities Guarantee and shall, to the extent applicable, be governed
by such provisions; and

(b) if and to the extent that any provision of this Preferred
Securities Guarantee limits, qualifies or conflicts with the duties imposed by
Section 310 to 317, inclusive, of the Trust Indenture Act, such imposed duties
shall control.

SECTION 2.2 Lists of Holders of Securities

(a) The Guarantor shall provide the Preferred Guarantee Trustee
with a list, in such form as the Preferred Guarantee Trustee may reasonably
require, of the names and addresses of the Holders of the Preferred Securities
("List of Holders") as of such date, (i) within 1 Business Day after January 1
and July 1 of each year, and (ii) at any other time within 30 days of receipt
by the Guarantor of a written request for a List of Holders as of a date no
more than 14 days before such List of Holders is given to the Preferred
Guarantee Trustee provided, that the

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Guarantor shall not be obligated to provide such List of Holders at any time
the List of Holders does not differ from the most recent List of Holders given
to the Preferred Guarantee Trustee by the Guarantor. The Preferred Guarantee
Trustee may destroy any List of Holders previously given to it on receipt of a
new List of Holders.

(b) The Preferred Guarantee Trustee shall comply with its
obligations under Section 311(a), 311(b) and Section 312(b) of the Trust
Indenture Act.

SECTION 2.3 Reports by the Preferred Guarantee Trustee

Within 60 days after May 15 of each year, the Preferred Guarantee
Trustee shall provide to the Holders of the Preferred Securities such reports
as are required by Section 313 of the Trust Indenture Act, if any, in the form
and in the manner provided by Section 313 of the Trust Indenture Act. The
Preferred Guarantee Trustee shall also comply with the requirements of Section
313(d) of the Trust Indenture Act.

SECTION 2.4 Periodic Reports to Preferred Guarantee Trustee

The Guarantor shall provide to the Preferred Guarantee Trustee such
documents, reports and information as required by Section 314 (if any) and the
compliance certificate required by Section 314 of the Trust Indenture Act in
the form, in the manner and at the times required by Section 314 of the Trust
Indenture Act.

SECTION 2.5 Evidence of Compliance with Conditions Precedent

The Guarantor shall provide to the Preferred Guarantee Trustee such
evidence of compliance with any conditions precedent, if any, provided for in
this Preferred Securities Guarantee that relate to any of the matters set forth
in Section 314(c) of the Trust Indenture Act. Any certificate or opinion
required to be given by an officer pursuant to Section 314(c)(1) may be given
in the form of an Officers' Certificate.

SECTION 2.6 Events of Default; Waiver

The Holders of a Majority in liquidation amount of Preferred
Securities may, by vote, on behalf of the Holders of all of the Preferred
Securities, waive any past Event of Default and its consequences. Upon such
waiver, any such Event of Default shall cease to exist, and any Event of
Default arising therefrom shall be deemed to have been cured, for every purpose
of this Preferred Securities Guarantee, but no such waiver shall extend to any
subsequent or other default or Event of Default or impair any right consequent
thereon.

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SECTION 2.7 Event of Default; Notice

(a) The Preferred Guarantee Trustee shall, within 90 days after
the occurrence of an Event of Default, transmit by mail, first class postage
prepaid, to the Holders of the Preferred Securities, notices of all Events of
Default actually known to a Responsible Officer of the Preferred Guarantee
Trustee, unless such defaults have been cured before the giving of such notice,
provided, that, the Preferred Guarantee Trustee shall be protected in
withholding such notice if and so long as a Responsible Officer of the
Preferred Guarantee Trustee in good faith determines that the withholding of
such notice is in the interests of the Holders of the Preferred Securities.

(b) The Preferred Guarantee Trustee shall not be deemed to have
knowledge of any Event of Default unless the Preferred Guarantee Trustee shall
have received written notice, or of which a Responsible Officer of the
Preferred Guarantee Trustee charged with the administration of the Declaration
shall have obtained actual knowledge.

SECTION 2.8 Conflicting Interests

The Declaration shall be deemed to be specifically described in
this Preferred Securities Guarantee for the purposes of clause (i) of the first
proviso contained in Section 310(b) of the Trust Indenture Act.

ARTICLE III
POWERS, DUTIES AND RIGHTS OF
PREFERRED GUARANTEE TRUSTEE

SECTION 3.1 Powers and Duties of the Preferred Guarantee Trustee

(a) This Preferred Securities Guarantee shall be held by the
Preferred Guarantee Trustee for the benefit of the Holders of the Preferred
Securities, and the Preferred Guarantee Trustee shall not transfer this
Preferred Securities Guarantee to any Person except a Holder of Preferred
Securities exercising his or her rights pursuant to Section 5.4(b) or to a
Successor Preferred Guarantee Trustee on acceptance by such Successor Preferred
Guarantee Trustee of its appointment to act as Successor Preferred Guarantee
Trustee. The right, title and interest of the Preferred Guarantee Trustee
shall automatically vest in any Successor Preferred Guarantee Trustee, and such
vesting and cessation of title shall be effective whether or not conveyancing
documents have been executed and delivered pursuant to the appointment of such
Successor Preferred Guarantee Trustee.

(b) If an Event of Default actually known to a Responsible
Officer of the Preferred Guarantee Trustee has occurred and

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is continuing, the Preferred Guarantee Trustee shall enforce this Preferred
Securities Guarantee for the benefit of the Holders of the Preferred
Securities.

(c) The Preferred Guarantee Trustee, before the occurrence of any
Event of Default and after the curing of all Events of Default that may have
occurred, shall undertake to perform only such duties as are specifically set
forth in this Preferred Securities Guarantee, and no implied covenants shall be
read into this Preferred Securities Guarantee against the Preferred Guarantee
Trustee. In case an Event of Default has occurred (that has not been cured or
waived pursuant to Section 2.6) and is actually known to a Responsible Officer
of the Preferred Guarantee Trustee, the Preferred Guarantee Trustee shall
exercise such of the rights and powers vested in it by this Preferred
Securities Guarantee, and use the same degree of care and skill in its exercise
thereof, as a prudent person would exercise or use under the circumstances in
the conduct of his or her own affairs.

(d) No provision of this Preferred Securities Guarantee shall be
construed to relieve the Preferred Guarantee Trustee from liability for its own
negligent action, its own negligent failure to act, or its own willful
misconduct, except that:

(i) prior to the occurrence of any Event of Default and after the
curing or waiving of all such Events of Default that may have occurred:

(A) the duties and obligations of the Preferred Guarantee
Trustee shall be determined solely by the express provisions of
this Preferred Securities Guarantee, and the Preferred Guarantee
Trustee shall not be liable except for the performance of such
duties and obligations as are specifically set forth in this
Preferred Securities Guarantee, and no implied covenants or
obligations shall be read into this Preferred Securities Guarantee
against the Preferred Guarantee Trustee; and

(B) in the absence of bad faith on the part of the
Preferred Guarantee Trustee, the Preferred Guarantee Trustee may
conclusively rely, as to the truth of the statements and the
correctness of the opinions expressed therein, upon any
certificates or opinions furnished to the Preferred Guarantee
Trustee and conforming to the requirements of this Preferred
Securities Guarantee; but in the case of any such certificates or
opinions that by any provision hereof are specifically required to
be furnished to the Preferred Guarantee Trustee, the Preferred
Guarantee Trustee shall be under a duty to examine the same to
determine

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whether or not they conform to the requirements of this Preferred
Securities Guarantee;

(ii) the Preferred Guarantee Trustee shall not be liable for any
error of judgment made in good faith by a Responsible Officer of the
Preferred Guarantee Trustee, unless it shall be proved that the Preferred
Guarantee Trustee was negligent in ascertaining the pertinent facts upon
which such judgment was made;

(iii) the Preferred Guarantee Trustee shall not be liable with
respect to any action taken or omitted to be taken by it in good faith in
accordance with the direction of the Holders of not less than a Majority
in liquidation amount of the Preferred Securities relating to the time,
method and place of conducting any proceeding for any remedy available to
the Preferred Guarantee Trustee, or exercising any trust or power
conferred upon the Preferred Guarantee Trustee under this Preferred
Securities Guarantee; and

(iv) no provision of this Preferred Securities Guarantee shall
require the Preferred Guarantee Trustee to expend or risk its own funds
or otherwise incur personal financial liability in the performance of any
of its duties or in the exercise of any of its rights or powers, if the
Preferred Guarantee Trustee shall have reasonable grounds for believing
that the repayment of such funds or liability is not reasonably assured
to it under the terms of this Preferred Securities Guarantee or
indemnity, reasonably satisfactory to the Preferred Guarantee Trustee,
against such risk or liability is not reasonably assured to it.

SECTION 3.2 Certain Rights of Preferred Guarantee Trustee

(a) Subject to the provisions of Section 3.1:

(i) The Preferred Guarantee Trustee may conclusively rely, and
shall be fully protected in acting or refraining from acting upon, any
resolution, certificate, statement, instrument, opinion, report, notice,
request, direction, consent, order, bond, debenture, note, other evidence
of indebtedness or other paper or document believed by it to be genuine
and to have been signed, sent or presented by the proper party or
parties.

(ii) Any direction or act of the Guarantor contemplated by this
Preferred Securities Guarantee shall be sufficiently evidenced by a
Direction or an Officers' Certificate.

(iii) Whenever, in the administration of this Preferred Securities
Guarantee, the Preferred Guarantee Trustee shall deem it desirable that a
matter be proved or established

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before taking, suffering or omitting any action hereunder, the Preferred
Guarantee Trustee (unless other evidence is herein specifically
prescribed) may, in the absence of bad faith on its part, request and
conclusively rely upon an Officers' Certificate which, upon receipt of
such request, shall be promptly delivered by the Guarantor.

(iv) The Preferred Guarantee Trustee shall have no duty to see to
any recording, filing or registration of any instrument (or any
rerecording, refiling or registration thereof).

(v) The Preferred Guarantee Trustee may consult with counsel, and
the written advice or opinion of such counsel with respect to legal
matters shall be full and complete authorization and protection in
respect of any action taken, suffered or omitted by it hereunder in good
faith and in accordance with such advice or opinion. Such counsel may be
counsel to the Guarantor or any of its Affiliates and may include any of
its employees. The Preferred Guarantee Trustee shall have the right at
any time to seek instructions concerning the administration of this
Preferred Securities Guarantee from any court of competent jurisdiction.

(vi) The Preferred Guarantee Trustee shall be under no obligation
to exercise any of the rights or powers vested in it by this Preferred
Securities Guarantee at the request or direction of any Holder, unless
such Holder shall have provided to the Preferred Guarantee Trustee such
security and indemnity, reasonably satisfactory to the Preferred
Guarantee Trustee, against the costs, expenses (including attorneys' fees
and expenses and the expenses of the Preferred Guarantee Trustee's
agents, nominees or custodians) and liabilities that might be incurred by
it in complying with such request or direction, including such reasonable
advances as may be requested by the Preferred Guarantee Trustee; provided
that, nothing contained in this Section 3.2(a)(vi) shall be taken to
relieve the Preferred Guarantee Trustee, upon the occurrence of an Event
of Default, of its obligation to exercise the rights and powers vested in
it by this Preferred Securities Guarantee.

(vii) The Preferred Guarantee Trustee shall not be bound to make
any investigation into the facts or matters stated in any resolution,
certificate, statement, instrument, opinion, report, notice, request,
direction, consent, order, bond, debenture, note, other evidence of
indebtedness or other paper or document, but the Preferred Guarantee
Trustee, in its discretion, may make such further inquiry or
investigation into such facts or matters as it may see fit.

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(viii) The Preferred Guarantee Trustee may execute any of the
trusts or powers hereunder or perform any duties hereunder either
directly or by or through agents, nominees, custodians or attorneys, and
the Preferred Guarantee Trustee shall not be responsible for any
misconduct or negligence on the part of any agent or attorney appointed
with due care by it hereunder.

(ix) Any action taken by the Preferred Guarantee Trustee or its
agents hereunder shall bind the Holders of the Preferred Securities, and
the signature of the Preferred Guarantee Trustee or its agents alone
shall be sufficient and effective to perform any such action. No third
party shall be required to inquire as to the authority of the Preferred
Guarantee Trustee to so act or as to its compliance with any of the terms
and provisions of this Preferred Securities Guarantee, both of which
shall be conclusively evidenced by the Preferred Guarantee Trustee's or
its agent's taking such action.

(x) Whenever in the administration of this Preferred Securities
Guarantee the Preferred Guarantee Trustee shall deem it desirable to
receive instructions with respect to enforcing any remedy or right or
taking any other action hereunder, the Preferred Guarantee Trustee (i)
may request instructions from the Holders of a Majority in liquidation
amount of the Preferred Securities, (ii) may refrain from enforcing such
remedy or right or taking such other action until such instructions are
received, and (iii) shall be protected in conclusively relying on or
acting in accordance with such instructions.

(b) No provision of this Preferred Securities Guarantee shall be
deemed to impose any duty or obligation on the Preferred Guarantee Trustee to
perform any act or acts or exercise any right, power, duty or obligation
conferred or imposed on it in any jurisdiction in which it shall be illegal, or
in which the Preferred Guarantee Trustee shall be unqualified or incompetent in
accordance with applicable law, to perform any such act or acts or to exercise
any such right, power, duty or obligation. No permissive power or authority
available to the Preferred Guarantee Trustee shall be construed to be a duty.

SECTION 3.3. Not Responsible for Recitals or Issuance of Guarantee

The recitals contained in this Guarantee shall be taken as the
statements of the Guarantor, and the Preferred Guarantee Trustee does not
assume any responsibility for their correctness. The Preferred Guarantee
Trustee makes no representation as to the validity or sufficiency of this
Preferred Securities Guarantee.

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ARTICLE IV
PREFERRED GUARANTEE TRUSTEE

SECTION 4.1 Preferred Guarantee Trustee; Eligibility

(a) There shall at all times be a Preferred Guarantee Trustee
which shall:

(i) not be an Affiliate of the Guarantor; and

(ii) be a corporation organized and doing business under the laws
of the United States of America or any State or Territory thereof or of
the District of Columbia, or a corporation or Person permitted by the
Securities and Exchange Commission to act as an institutional trustee
under the Trust Indenture Act, authorized under such laws to exercise
corporate trust powers, having a combined capital and surplus of at least
50 million U.S. dollars ($50,000,000), and subject to supervision or
examination by Federal, State, Territorial or District of Columbia
authority. If such corporation publishes reports of condition at least
annually, pursuant to law or to the requirements of the supervising or
examining authority referred to above, then, for the purposes of this
Section 4.1(a)(ii), the combined capital and surplus of such corporation
shall be deemed to be its combined capital and surplus as set forth in
its most recent report of condition so published.

(b) If at any time the Preferred Guarantee Trustee shall cease to
be eligible to so act under Section 4.1(a), the Preferred Guarantee Trustee
shall immediately resign in the manner and with the effect set out in Section
4.2(c).

(c) If the Preferred Guarantee Trustee has or shall acquire any
"conflicting interest" within the meaning of Section 310(b) of the Trust
Indenture Act, the Preferred Guarantee Trustee and Guarantor shall in all
respects comply with the provisions of Section 310(b) of the Trust Indenture
Act.

SECTION 4.2 Appointment, Removal and Resignation of Preferred Guarantee
Trustees

(a) Subject to Section 4.2(b), the Preferred Guarantee Trustee
may be appointed or removed without cause at any time by the Guarantor.

(b) The Preferred Guarantee Trustee shall not be removed in
accordance with Section 4.2(a) until a Successor Preferred Guarantee Trustee
has been appointed and has accepted such appointment by written instrument
executed by such Successor Preferred Guarantee Trustee and delivered to the
Guarantor.

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(c) The Preferred Guarantee Trustee appointed to office shall
hold office until a Successor Preferred Guarantee Trustee shall have been
appointed or until its removal or resignation. The Preferred Guarantee Trustee
may resign from office (without need for prior or subsequent accounting) by an
instrument in writing executed by the Preferred Guarantee Trustee and delivered
to the Guarantor, which resignation shall not take effect until a Successor
Preferred Guarantee Trustee has been appointed and has accepted such
appointment by instrument in writing executed by such Successor Preferred
Guarantee Trustee and delivered to the Guarantor and the resigning Preferred
Guarantee Trustee.

(d) If no Successor Preferred Guarantee Trustee shall have been
appointed and accepted appointment as provided in this Section 4.2 within 60
days after delivery to the Guarantor of an instrument of resignation, the
resigning Preferred Guarantee Trustee may petition any court of competent
jurisdiction for appointment of a Successor Preferred Guarantee Trustee. Such
court may thereupon, after prescribing such notice, if any, as it may deem
proper, appoint a Successor Preferred Guarantee Trustee.

(e) No Preferred Guarantee Trustee shall be liable for the acts
or omissions to act of any Successor Preferred Guarantee Trustee.

(f) Upon termination of this Preferred Securities Guarantee or
removal or resignation of the Preferred Guarantee Trustee pursuant to this
Section 4.2, the Guarantor shall pay to the Preferred Guarantee Trustee all
amounts accrued to the date of such termination, removal or resignation.

ARTICLE V
GUARANTEE

SECTION 5.1 Guarantee

The Guarantor irrevocably and unconditionally agrees to pay in full
to the Holders the Guarantee Payments (without duplication of amounts
theretofore paid by the Issuer), as and when due, regardless of any defense,
right of set-off or counterclaim that the Issuer may have or assert. The
Guarantor's obligation to make a Guarantee Payment may be satisfied by direct
payment of the required amounts by the Guarantor to the Holders or by causing
the Issuer to pay such amounts to the Holders.

SECTION 5.2 Waiver of Notice and Demand

The Guarantor hereby waives notice of acceptance of this Preferred
Securities Guarantee and of any liability to which it applies or may apply,
presentment, demand for payment, any

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right to require a proceeding first against the Issuer or any other Person
before proceeding against the Guarantor, protest, notice of nonpayment, notice
of dishonor, notice of redemption and all other notices and demands.

SECTION 5.3 Obligations Not Affected

The obligations, covenants, agreements and duties of the Guarantor
under this Preferred Securities Guarantee shall in no way be affected or
impaired by reason of the happening from time to time of any of the following:

(a) the release or waiver, by operation of law or otherwise, of
the performance or observance by the Issuer of any express or implied
agreement, covenant, term or condition relating to the Preferred Securities to
be performed or observed by the Issuer;

(b) the extension of time for the payment by the Issuer of all or
any portion of the Distributions, Repayment Price, Liquidation Distribution or
any other sums payable under the terms of the Preferred Securities or the
extension of time for the performance of any other obligation under, arising
out of, or in connection with, the Preferred Securities (other than an
extension of time for payment of Distributions, Repayment Price, Liquidation
Distribution or other sum payable that results from the extension of any
interest payment period on the Debentures or any extension of the maturity date
of the Debentures permitted by the Indenture);

(c) any failure, omission, delay or lack of diligence on the part
of the Holders to enforce, assert or exercise any right, privilege, power or
remedy conferred on the Holders pursuant to the terms of the Preferred
Securities, or any action on the part of the Issuer granting indulgence or
extension of any kind;

(d) the voluntary or involuntary liquidation, dissolution, sale
of any collateral, receivership, insolvency, bankruptcy, assignment for the
benefit of creditors, reorganization, arrangement, composition or readjustment
of debt of, or other similar proceedings affecting, the Issuer or any of the
assets of the Issuer;

(e) any invalidity of, or defect or deficiency in, the Preferred
Securities;

(f) the settlement or compromise of any obligation guaranteed
hereby or hereby incurred; or

(g) any other circumstance whatsoever that might otherwise
constitute a legal or equitable discharge or defense of

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a guarantor, it being the intent of this Section 5.3 that the obligations of
the Guarantor hereunder shall be absolute and unconditional under any and all
circumstances.

There shall be no obligation of the Holders to give notice to, or
obtain consent of, the Guarantor with respect to the happening of any of the
foregoing.

SECTION 5.4 Rights of Holders

(a) The Holders of a Majority in liquidation amount of the
Preferred Securities have the right to direct the time, method and place of
conducting of any proceeding for any remedy available to the Preferred
Guarantee Trustee in respect of this Preferred Securities Guarantee or
exercising any trust or power conferred upon the Preferred Guarantee Trustee
under this Preferred Securities Guarantee.

(b) If the Preferred Guarantee Trustee fails to enforce this
Preferred Securities Guarantee, any Holder of Preferred Securities may
institute a legal proceeding directly against the Guarantor to enforce its
rights under this Preferred Securities Guarantee, without first instituting a
legal proceeding against the Issuer, the Preferred Guarantee Trustee or any
other Person. Notwithstanding the foregoing, if the Guarantor has failed to
make a Guarantee Payment, a holder of Preferred Securities may directly
institute a proceeding against the Guarantor for enforcement of the Preferred
Security Guarantee for such payment. The Guarantor waives any right or remedy
to require that any action on this Preferred Securities Guarantee be brought
first against the Issuer or any other person or entity before proceeding
directly against the Guarantor.

SECTION 5.5 Guarantee of Payment

This Preferred Securities Guarantee creates a guarantee of payment
and not of collection.

SECTION 5.6 Subrogation

The Guarantor shall be subrogated to all (if any) rights of the
Holders of Preferred Securities against the Issuer in respect of any amounts
paid to such Holders by the Guarantor under this Preferred Securities
Guarantee; provided, however, that the Guarantor shall not (except to the
extent required by mandatory provisions of law) be entitled to enforce or
exercise any right that it may acquire by way of subrogation or any indemnity,
reimbursement or other agreement, in all cases as a result of payment under
this Preferred Securities Guarantee, if, at the time of any such payment, any
amounts are due and unpaid under this Preferred Securities Guarantee. If any
amount shall be paid to the Guarantor in violation of the preceding sentence,

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the Guarantor agrees to hold such amount in trust for the Holders and to pay
over such amount to the Holders.

SECTION 5.7 Independent Obligations

The Guarantor acknowledges that its obligations hereunder are
independent of the obligations of the Issuer with respect to the Preferred
Securities, and that the Guarantor shall be liable as principal and as debtor
hereunder to make Guarantee Payments pursuant to the terms of this Preferred
Securities Guarantee notwithstanding the occurrence of any event referred to in
subsections (a) through (g), inclusive, of Section 5.3 hereof.

ARTICLE VI
LIMITATION OF TRANSACTIONS; SUBORDINATION

SECTION 6.1 Limitation of Transactions

So long as any Preferred Securities remain outstanding, if there
shall have occurred an Event of Default or an event of default under the
Declaration, then (a) the Guarantor shall not declare or pay any dividend on,
make any distributions with respect to, or redeem, purchase, acquire or make a
liquidation payment with respect to, any of its capital stock (other than (i)
purchases or acquisitions of shares of its common stock in connection with the
satisfaction by the Guarantor of its obligations under any employee benefit
plans or the satisfaction by the Guarantor of its obligations pursuant to any
contract or security outstanding on the date of such event requiring the
Guarantor to purchase shares of its common stock, (ii) as a result of a
reclassification of its capital stock or the exchange or conversion of one
class or series of its capital stock for another class or series of its capital
stock or, (iii) the purchase of fractional interests in shares of its capital
stock pursuant to the conversion or exchange provisions of such capital stock
or security being converted or exchanged) or make any guarantee payment with
respect thereto, (b) the Guarantor shall not make any payment of interest,
principal or premium, if any, on or repay, repurchase or redeem any debt
securities issued by the Guarantor which rank pari passu with or junior to the
Debentures or any other junior subordinated debentures issued by the Guarantor
and the Guarantor shall not make any guarantee payments with respect to the
foregoing (other than the Guaranty Payments).

SECTION 6.2 Ranking

This Preferred Securities Guarantee will constitute an unsecured
obligation of the Guarantor and will rank (i) subordinate and junior in right
of payment to all other liabilities of the Guarantor except those liabilities
of the Guarantor made pari passu or subordinate by their terms, (ii) pari passu
with the

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most senior preferred or preference stock now or hereafter issued by the
Guarantor and with any guarantee now or hereafter entered into by the Guarantor
in respect of any preferred or preference stock of any Affiliate of the
Guarantor, and (iii) senior to the Guarantor's common stock.

ARTICLE VII
TERMINATION

SECTION 7.1 Termination

This Preferred Securities Guarantee shall terminate upon (i) full
payment of the Repayment Price of all Preferred Securities, (ii) upon the
distribution of the Debentures to the Holders of all of the Preferred
Securities or (iii) upon full payment of the amounts payable in accordance with
the Declaration upon liquidation of the Issuer. Notwithstanding the foregoing,
this Preferred Securities Guarantee will continue to be effective or will be
reinstated, as the case may be, if at any time any Holder of Preferred
Securities must restore payment of any sums paid under the Preferred Securities
or under this Preferred Securities Guarantee.

ARTICLE VIII
INDEMNIFICATION

SECTION 8.1 Exculpation

(a) No Indemnified Person shall be liable, responsible or
accountable in damages or otherwise to the Guarantor or any Covered Person for
any loss, damage or claim incurred by reason of any act or omission performed
or omitted by such Indemnified Person in good faith in accordance with this
Preferred Securities Guarantee and in a manner that such Indemnified Person
reasonably believed to be within the scope of the authority conferred on such
Indemnified Person by this Preferred Securities Guarantee or by law, except
that an Indemnified Person shall be liable for any such loss, damage or claim
incurred by reason of such Indemnified Person's negligence or willful
misconduct with respect to such acts or omissions.

(b) An Indemnified Person shall be fully protected in relying in
good faith upon the records of the Guarantor and upon such information,
opinions, reports or statements presented to the Guarantor by any Person as to
matters the Indemnified Person reasonably believes are within such other
Person's professional or expert competence and who has been selected with
reasonable care by or on behalf of the Guarantor, including information,
opinions, reports or statements as to the value and amount of the assets,
liabilities, profits, losses, or any other facts perti-

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nent to the existence and amount of assets from which Distributions to Holders
of Preferred Securities might properly be paid.

SECTION 8.2 Indemnification

(a) To the fullest extent permitted by applicable law, the
Guarantor shall indemnify and hold harmless each Indemnified Person from and
against any loss, damage or claim incurred by such Indemnified Person by reason
of any act or omission performed or omitted by such Indemnified Person in good
faith in accordance with this Guarantee Agreement and in a manner such
Indemnified Person reasonably believed to be within the scope of authority
conferred on such Indemnified Person by this Guarantee Agreement, except that
no Indemnified Person shall be entitled to be indemnified in respect of any
loss, damage or claim incurred by such Indemnified Person by reason of
negligence or willful misconduct with respect to such acts or omissions.

(b) To the fullest extent permitted by applicable law, reasonable
expenses (including legal fees) incurred by an Indemnified person in defending
any claim, demand, action, suit or proceeding shall, from time to time, be
advanced by the Guarantor prior to the final disposition of such claim, demand,
action, suit or proceeding upon receipt by the Guarantor of an undertaking by
or on behalf of the Indemnified Person to repay such amount if it shall be
determined that the Indemnified Person is not entitled to be indemnified as
authorized in Section 8.2(a).

(c) The obligation to indemnify as set forth in this Section 8.2
shall survive the termination of the Preferred Securities Guarantee.

ARTICLE IX
MISCELLANEOUS

SECTION 9.1 Successors and Assigns

All guarantees and agreements contained in this Preferred
Securities Guarantee shall bind the successors, assigns, receivers, trustees
and representatives of the Guarantor and shall inure to the benefit of the
Holders of the Preferred Securities then outstanding.

SECTION 9.2 Amendments

Except with respect to any changes that do not adversely affect the
rights of Holders (in which case no consent of Holders will be required), this
Preferred Securities Guarantee may only be amended with the prior approval of
the Holders of at least a Majority in liquidation amount (including the stated
amount that would be paid on redemption, liquidation or other-

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wise, plus accrued and unpaid Distributions to the date upon which the voting
percentages are determined) of all the outstanding Preferred Securities. The
provisions of Section 12.2 of the Declaration with respect to meetings of
Holders of the Securities apply to the giving of such approval.

SECTION 9.3 Notices

All notices provided for in this Preferred Securities Guarantee
shall be in writing, duly signed by the party giving such notice, and shall be
delivered, telecopied or mailed by registered or certified mail, as follows:

(a) If given to the Preferred Guarantee Trustee, at the Preferred
Guarantee Trustee's mailing address set forth below (or such other address as
the Preferred Guarantee Trustee may give notice of to the Holders of the
Preferred Securities):

Wilmington Trust Company
Rodney Square North
1100 North Market Street
Wilmington, Delaware 19890
Attention: Corporate Trust Administration

(b) If given to the Guarantor, at the Guarantor's mailing address
set forth below (or such other address as the Guarantor may give notice of to
the Holders of the Preferred Securities):

MCN Energy Group Inc.
500 Griswold Street
Detroit, MI 48226
Attention: Office of Treasurer

All such notices shall be deemed to have been given when received
in person, telecopied with receipt confirmed, or mailed by first class mail,
postage prepaid except that if a notice or other document is refused delivery
or cannot be delivered because of a changed address of which no notice was
given, such notice or other document shall be deemed to have been delivered on
the date of such refusal or inability to deliver.

SECTION 9.4 Benefit

This Preferred Securities Guarantee is solely for the benefit of
the Holders of the Preferred Securities and, subject to Section 3.1(a), is not
separately transferable from the Preferred Securities.

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SECTION 9.5 Governing Law

THIS PREFERRED SECURITIES GUARANTEE SHALL BE GOVERNED BY, AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW
YORK.

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THIS PREFERRED SECURITIES GUARANTEE is executed as of the day and
year first above written.

MCN CORPORATION, as Guarantor

By: /s/ Sebastian Coppola
------------------------------
Name: Sebastian Coppola
Title: Senior Vice President
and Treasurer

WILMINGTON TRUST COMPANY,
as Preferred Guarantee Trustee

By: /s/ Denise M. Geran
-------------------------------
Name: Denise M. Geran
Title: Financial Services
Officer