WAIVER, CONSENT AND MODIFICATION AGREEMENT


         This WAIVER, CONSENT AND MODIFICATION AGREEMENT (this "Agreement"),
dated as of September 22, 1995, among United Auto Group, Inc. (formerly EMCO
Motor Holdings, Inc.), a Delaware corporation (the "Company"), the Common
Holders (as defined below) and the Preferred Holders (as defined below).


                                 W I T N E S S E T H:


         WHEREAS, the Company has entered into (i) the Class A Preferred Stock
Purchase Agreement (the "Preferred Purchase Agreement"), dated October 15, 1993,
with the investors listed on Exhibit A thereto (collectively, the "Preferred
Holders"), and '21' International Holdings, Inc., a Delaware corporation
("TIHI"),  and Ezra P. Mager ("Mager" and, together with TIHI, the "Common
Holders"), and (ii) the Common Stock Purchase Agreement, dated October 15, 1993,
with the Common Holders (the "Common Purchase Agreement" and, collectively with
the Preferred Purchase Agreement, the "Stock Purchase Agreements");

         WHEREAS, the Restated Certificate of Incorporation of the Company (the
"Certificate of Incorporation") provides the Common Holders and the Preferred
Holders with certain rights with respect to the Company's common stock, par
value $0.0001 (the "Common Stock") and the Company's Class A Preferred Stock,
par value $0.0001 (the "Preferred Stock");

         WHEREAS, the Company has entered into the Registration Rights
Agreement (the "Registration Rights Agreement"), dated as of October 15, 1993,
with the Preferred Holders and TIHI;

         WHEREAS, on August 15, 1995, TIHI contributed all of its shares of
Common Stock to '21' Auto Holdings, Inc., a Delaware corporation and wholly
owned subsidiary of TIHI ("'21' Auto"), and '21' Auto agreed to be bound by the
Common Stock Purchase Agreement and Registration Rights Agreement and, as such,
is deemed a "Common Holder" hereunder;

         WHEREAS, immediately upon entering into this Agreement, the Company
will enter into several Securities Purchase Agreements (as in effect on the date
hereof, the "Securities Purchase Agreements") with the institutional investors
listed in Schedule A thereto (the "Investors") pursuant to which the Company
will issue and sell to the Investors up to $35,000,000 in aggregate principal
amount of its senior notes in several tranches (the "Senior Notes") and, in
connection therewith, warrants to purchase shares of Common Stock (as in effect
on the date hereof, the "Senior


Warrants") which, in the event that certain approvals relating to the exercise
of the Warrants are not obtained, will convert into contingent value obligations
(the "CVOs");

         WHEREAS, pursuant to the Certificate of Incorporation and except as
otherwise set forth therein,  the Company is prohibited from authorizing or
issuing, or obligating itself to authorize or issue, any additional shares of
securities without the consent of the holders of a majority of the Preferred
Stock then outstanding;

         WHEREAS, pursuant to the Certificate of Incorporation, the issuance
and sale of the Warrants may result in an adjustment in the Applicable
Conversion Value (as defined in the Certificate of Incorporation) relating to
the Preferred Stock and in the right of each holder of Preferred Stock or Common
Stock to purchase its PRO RATA portion of any securities newly issued by the
Company, unless otherwise waived by the holders of the majority of the shares of
Preferred Stock then outstanding;

         WHEREAS, the Company desires to amend the Certificate of Incorporation
to provide for, among other things, a class of non-voting common stock to be
issued upon exercise of certain of the Warrants;

         WHEREAS, pursuant to the Senior Warrants, the holders of Senior
Warrants or shares of Common Stock (or shares of non-voting common stock of the
Company, as the case may be) issued upon exercise of the Senior Warrants (the
"Warrant Shares") will be entitled to certain registration rights relating to
the Warrant Shares;

         WHEREAS, pursuant to each Stock Purchase Agreement and except as
otherwise set forth therein, the Company is prohibited from issuing additional
shares of capital stock or warrants to purchase such shares without the prior
written consent of the holders of at least a majority of the outstanding shares
of Preferred Stock or Common Stock, as the case may be;

         WHEREAS, pursuant to Section 8 of the Preferred Purchase Agreement,
after December 29, 1999, the Company will be required under certain
circumstances to issue to the Preferred Holders, at their option, either
warrants (the "Preferred Warrants") to purchase Common Stock or promissory notes
(the "Preferred Notes") secured by the assets of the Company to the extent such
assets are not otherwise encumbered; and

         WHEREAS, it is a condition precedent to the Securities Purchase
Agreements that certain rights of the Common Holders and Preferred Holders with
respect to the Company be waived and that certain existing agreements be
amended, all as set forth herein;


         NOW, THEREFORE, in consideration of the premises and of the terms and
provisions set forth herein, the parties hereby agree as follows:

         SECTION 1.  WAIVERS AND CONSENTS RELATING TO THE CERTIFICATE OF
INCORPORATION.

         (a) CONSENT TO SENIOR WARRANTS AND WARRANT SHARES.  Pursuant to
Section 8(b) of Article IV of the Certificate of Incorporation, the
authorization and issuance of the Senior Warrants, the Warrant Shares and, if
applicable, the CVOs in accordance with the Securities Purchase Agreements and
the Senior Warrants are hereby approved.

         (b) ANTI-DILUTION.  Pursuant to Section 5.4(a)(iv)(G) of Article IV of
the Certificate of Incorporation, application of Section 5.4(a) of Article IV of
the Certificate of Incorporation is hereby waived with respect to the issuance
or sale of, or any obligation, agreement or undertaking to issue or sell, the
Senior Warrants, the Warrant Shares or the CVOs in accordance with the
Securities Purchase Agreements and the Senior Warrants.

         (c) PRE-EMPTIVE RIGHTS.  Pursuant to Article VI of the Certificate of
Incorporation, neither the Senior Warrants nor the Warrant Shares nor, if
applicable, the CVOs shall constitute "New Securities" for purposes of Article
VI of the Certificate of Incorporation.

         (d) AMENDMENT TO CERTIFICATE OF INCORPORATION.  Pursuant to Sections
228 and 242 of the Delaware General Corporation Law and Section 8(b)(vii) of
Article IV of the Certificate of Incorporation, the amendment to the Certificate
of Incorporation, in the form set forth in EXHIBIT 1(D) hereto, is hereby
approved.

         SECTION 2.  AMENDMENTS TO THE REGISTRATION RIGHTS AGREEMENT.  Pursuant
to Section 2.4 of the Registration Rights Agreement, the Registration Rights
Agreement is hereby amended as follows:


         (a) UNDERWRITING REQUIREMENTS.  The second sentence of Section 1.8
shall be amended in its entirety to read:

         "If the managing underwriter for the offering shall advise the Company
         in writing that the total amount of securities, including Registrable
         Securities, requested by shareholders to be included in such offering
         exceeds the amount of securities to be sold other than by the Company
         that can be successfully offered, then the Company shall be required
         to include in the offering


                                         -3-


         only that number of such securities, including Registrable Securities,
         which the managing underwriter believes will not jeopardize the
         success of the offering (the securities so included to be reduced as
         follows:  all securities which stockholders other than the Company and
         the Holders seek to include in the offering shall be excluded from the
         offering to the extent limitation on the number of shares included in
         the underwriting is required (unless (i) such securities are being
         registered pursuant to Section 11.2 of the Warrants (the "Warrants")
         issued pursuant to the several Securities Purchase Agreements, dated
         as of September 22, 1995, among the Company and the institutional
         investors listed in Schedule A thereto, or Section 1.2 of the
         Registration Rights Agreement (the "Venture Registration Rights
         Agreement"), dated as of August 1, 1995, among the Company, Steve
         Landers, John Landers and certain other persons party thereto from
         time to time, in which case such securities shall be included in the
         offering prior to including any Registrable Securities or (ii) such
         securities are being registered pursuant to Section 11.3 of the
         Warrants or Section 1.3 of the Venture Registration Rights Agreement,
         in which case such securities shall be included in the offering on a
         PRO RATA basis with the Registrable Securities), and, if further
         limitation on the number of shares to be included in the underwriting
         is required, then the number of shares held by Holders that may be
         included in the underwriting shall be reduced PRO RATA among the
         selling Holders in accordance with the number of shares of Registrable
         Securities held by such Holders but in no event shall the amount of
         securities of the selling Holders included in the offering be reduced
         below 35% of the total amount of securities such selling Holders have
         requested to be included in such offering, unless such offering is the
         initial public offering of the Company's securities in which case the
         selling Holders may be excluded if the managing underwriter makes the
         determination described above and no securities other than those of
         the Company are included.)"

         (b) LOCK-UP.  Section 1.12 shall be amended in its entirety to read:

              "1.12  LOCK-UP AGREEMENTS. If reasonably requested by the Company
         and any managing underwriter, the Holders agree to enter into lock-up
         agreements pursuant to which they will not, for a period of 120 days
         following the effective date of a registration statement for any


                                         -4-


         primary or secondary public offering of the Company's securities (or a
         period of 180 days following the initial public offering of the
         Company's securities) and for such reasonable period of time prior to
         the effective date of such registration statement as the Company and
         such underwriter may specify, offer, sell or otherwise dispose of any
         Registrable Securities, except any Registrable Securities sold
         pursuant to such registration statement, without the prior consent of
         the Company and such underwriter."


         (c) INCLUSION OF MAGER.  The parties hereto acknowledge that Mager was
inadvertently not made a party to the Registration Rights Agreement and,
accordingly, shall be deemed a party thereto for all purposes thereunder.

         SECTION 3.  AMENDMENTS TO AND WAIVERS, CONSENTS AND AGREEMENTS
RELATING TO THE STOCK PURCHASE AGREEMENTS.

         (a) CONSENT TO SENIOR WARRANTS AND WARRANT SHARES.  Pursuant to
Section 7.11 of the Preferred Purchase Agreement and Section 7.9 of the Common
Purchase Agreement, the issuance and sale of the Senior Warrants, the Warrant
Shares and, if applicable, the CVOs in accordance with the Securities Purchase
Agreements and the Senior Warrants are hereby approved.

         (b) MODIFICATIONS RELATING TO PREFERRED NOTES.  (i) Notwithstanding
anything in the Preferred Purchase Agreement to the contrary, pursuant to
Section 9.5 of the Preferred Purchase Agreement, in the event that the Preferred
Holders shall be entitled to receive the Preferred Notes pursuant to Section 8.2
of the Preferred Purchase Agreement and have notified the Company in writing of
their election to so receive the Preferred Notes, a copy of which notice shall
be promptly sent to each holder of the Senior Notes, as soon as practicable but
in no event later than 20 days following such notice and as a condition
precedent to the issuance of the Preferred Notes:

              (A) the Company at its sole expense shall duly organize a wholly
    owned subsidiary incorporated in the State of Delaware (such corporation to
    be referred to herein as "Newco") and transfer to Newco (1) all of the
    assets of the Company, including, without limitation, all of the capital
    stock or other ownership interests in all of the subsidiaries of the
    Company other than, at the option of the Company, the capital stock of
    Atlantic Auto Finance Corporation ("Atlantic Auto"), such that the sole
    remaining assets of the Company shall be all of the issued and outstanding
    capital stock of Newco and, if the Company so elects, Atlantic Auto and (2)


                                         -5-


    the liabilities evidenced by the Senior Notes, after which all references
    in the Securities Purchase Agreements to "the Company" shall also be deemed
    to refer to Newco;

              (B) upon the formation of Newco and the transfers contemplated in
    clause (A) above, the Company shall execute and deliver (1) to the holders
    of the Senior Notes a guaranty (the "Senior Note Guaranty") of payment of
    the Senior Notes, substantially in the form of Exhibit 9.6-2 to the
    Securities Purchase Agreements, and (2) to the collateral agent for the
    holders of the Senior Notes a pledge agreement (the "Senior Note Pledge
    Agreement"), substantially in the form of Exhibit 9.6-1 to the Securities
    Purchase Agreements, securing the Senior Note Guaranty by a first priority
    lien on all of the issued and outstanding capital stock of Newco and
    Atlantic Auto (if such capital stock of Atlantic Auto is directly held by
    the Company);

              (C) upon the formation of Newco and the transfers contemplated in
    clause (A) above, the date of maturity of the Preferred Notes shall be
    modified to coincide with the date of maturity of the Senior Notes by
    amending the form of promissory note in Exhibit J to the Preferred Purchase
    Agreement as follows:  (1) the first sentence of the first paragraph
    following the legend shall be amended to read:

              "FOR VALUE RECEIVED, the undersigned, United Auto Group, Inc., a
         Delaware corporation (the "Company"), hereby promises to pay to
         _____________ (the "Payee") or order, on [the date of maturity of the
         Company's Senior Notes due 2003], the principal sum of __________
         DOLLARS ($__________), which amount equals the Payee's pro rata
         portion of 50% of the Fair Market Value of the Company determined in
         accordance with Section 8.3 of the Stock Purchase Agreement (as
         defined below).";

    and (2) Section 1 shall be amended to read in its entirety:

         "1.  NOTES.  This Note is one of the Notes issued by the Company
         pursuant to Section 8.2 of the Stock Purchase Agreement with a
         maturity date of [the date of maturity of the Company's Senior Notes
         due 2003] and evidences a return of the Payee's investment in the
         Company's Class A Preferred Stock.";

              (D) the holders of the Preferred Notes shall enter into a
    subordination agreement (the "Subordination Agreement"), substantially in
    the form set forth in EXHIBIT 3(B)(I)(D) hereto (together with an
    intercreditor agreement


                                         -6-


    substantially in the form of Exhibit A to the Subordination Agreement),
    with the holders of the Senior Notes providing for, among other things, the
    subordination of the Preferred Notes to the Senior Notes and the waiver of
    certain rights of the holders of the Preferred Notes;

              (E) the Company shall either (1) deliver to the holders of the
    Senior Notes a certificate executed by the chief financial officer of the
    Company stating that, after giving effect to the transactions contemplated
    by clause (A) of this Section 3(b), the fair value of the assets of the
    Company will exceed the total amount of its liabilities and the Company
    will be able to pay its debts as they mature, or (2) simultaneously with
    the transfer of assets contemplated by clause (A) of this Section 3(b),
    transfer all of the liabilities of the Company (other than the Preferred
    Notes) to Newco to the extent permitted, such that the sole remaining
    liabilities of the Company shall be the Preferred Notes and those
    liabilities, if any, relating to the Company's ownership of the capital
    stock of Atlantic Auto; and

              (F) the holders of the Senior Notes shall have received an
    opinion of the Company's outside legal counsel (who shall be reasonably
    satisfactory to the holders of a majority of the outstanding principal
    amount of Senior Notes), substantially in the form set forth in EXHIBIT
    3(b)(i)(F) hereto, which opinion shall contain such assumptions,
    qualifications and exceptions as are customary and as such counsel deems
    appropriate; and

         (ii) Notwithstanding that pursuant to Section 2.1.15 of the Security
Agreement (the "Preferred Security Agreement") to be entered into between the
Company and the collateral agent for the Preferred Holders substantially in the
form of Exhibit K to the Preferred Purchase Agreement, the capital stock of
Newco and, if applicable, Atlantic Auto, as the sole assets of the Company, will
be excluded from the Collateral (as defined in the Preferred Security Agreement)
securing the Credit Obligations (as defined in the Preferred Security
Agreement), for purposes of the Preferred Security Agreement, the Collateral
shall be deemed to consist of, and only of, the capital stock of Newco, and, if
applicable, Atlantic Auto, thereby creating a subordinated pledge in such
capital stock, which subordinated pledge will be subject to the terms of the
Subordination Agreement and the Senior Note Pledge Agreement; and


                                         -7-



         (c)  FURTHER AGREEMENTS RELATING TO PREFERRED NOTES.  In the event
that the Preferred Notes are issued as contemplated in Section 3(b) hereof:

         (i) '21' Auto hereby agrees to vote, and TIHI hereby agrees to cause
'21' Auto to vote, all shares of Common Stock held by '21' Auto in accordance
with the written instructions of the holders of a majority of the Preferred
Stock then outstanding in connection with any required shareholder approval of
any proposed merger, consolidation, sale of all of the capital stock or sale of
all or substantially all of the assets of the Company ; and

         (ii) the holders of a majority of the shares of Preferred Stock then
outstanding shall have the right to purchase all, but not less than all, of the
Senior Notes from the holders thereof by paying to each holder of Senior Notes
in immediately available funds the principal amount thereof and the accrued
interest and applicable premium thereon pursuant to the terms and conditions
contained in Sections 8.1 through 8.3 of the Securities Purchase Agreements;
PROVIDED, HOWEVER, that notwithstanding the last sentence of Section 8.3 of the
Securities Purchase Agreements, any Senior Notes so purchased shall not be
surrendered to the Company or cancelled solely on account of such purchase but
shall be transferred to and held by such holders of Preferred Stock on a PRO
RATA basis based upon the amount of Senior Notes purchased by each holder until
such Senior Notes are repaid upon maturity or otherwise cancelled pursuant to
their terms.  Any Senior Notes so transferred to the Preferred Holders shall
remain subject to the rights of the Company pursuant to Sections 8.1 through 8.3
of the Securities Purchase Agreements.

         (d) FURTHER ASSURANCES.  The Company hereby agrees that, without the
prior written consent of (A) the holders of a majority of the shares of
Preferred Stock then outstanding and (B) the holders of a majority of the
aggregate principal amount of Senior Notes then outstanding, it will not enter
into any agreements that would restrict its ability to implement the matters set
forth in clauses (A) through (D) of Section 3(b)(i) hereof.

         (e) ADJUSTMENT TO PREFERRED WARRANTS.  In the event that the Preferred
Warrants are issued pursuant to Section 8.1 of the Preferred Purchase Agreement,
the determination of the number of shares of Voting Common Stock purchasable
upon exercise of such Preferred Warrants shall take into account the adjustment
of the number of Warrant Shares purchasable upon exercise of the Senior Warrants
pursuant to Section 8.1(e) of the Senior Warrants such that '21' Auto and its
transferees will bear the dilution caused by the issuance of all of the
Preferred Warrants and by the related adjustments to the Senior Warrants.


                                         -8-


         SECTION 4.  TAG-ALONG RIGHT.  Pursuant to Section 20 of the Senior
Warrants, each Common Holder and each Preferred Holder hereby agrees to comply
with the terms and provisions of Section 12.1 of the Senior Warrants relating to
the right of the holders of the Senior Warrants, under certain conditions, to
participate in a sale by such Common Holder or Preferred Holder, as applicable,
of capital stock of the Company to a third party, as more fully described in
such Section 12.1.

         SECTION 5.  MISCELLANEOUS.

         (a) AUTHORITY TO AMEND AND WAIVE.  (i) The Preferred Holders party
hereto hold in the aggregate a sufficient number of shares of Preferred Stock to
amend or waive as contemplated in this Agreement the provisions of the
Certificate of Incorporation, the Registration Rights Agreement, the Preferred
Purchase Agreement, the form of Preferred Note and the form of Preferred
Security Agreement pursuant to their respective terms.  (ii) The Common Holders
party hereto hold in the aggregate a sufficient number of shares of Common Stock
to waive as contemplated in this Agreement the provisions of the Common Purchase
Agreement pursuant to its terms.

         (b) NO IMPLIED MODIFICATIONS.  Except for the modifications and
agreements set forth herein, (i) the Certificate of Incorporation, the
Registration Rights Agreement, the Preferred Purchase Agreement and the Common
Purchase Agreement shall remain in full force and effect in accordance with
their respective terms and (ii) the forms of Preferred Security Agreement and
promissory note set forth in the various exhibits referenced herein shall
continue to read as set forth therein.

         (c) EFFECT OF HEADINGS.  The section and paragraph headings herein are
for convenience only and shall not affect the construction hereof.

         (d) COUNTERPARTS.  This Agreement may be executed in any number of
counterparts by the parties hereto, and all of said counterparts taken together
shall be deemed to constitute one and the same document.

         (e)  GOVERNING LAW.  THIS AGREEMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.


                                         -9-


         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
be duly executed and delivered as of the date first above written.

                             UNITED AUTO GROUP, INC.



                             By:  /s/ Carl Spielvogel
                                  ----------------------------
                                  Name:  Carl Spielvogel
                                  Title: Chairman of the Board and
                                         Chief Financial Officer

                             COMMON HOLDERS

                             '21' INTERNATIONAL HOLDINGS, INC.



                             By:  /s/ Robert H. Nelson
                                  ----------------------------
                                  Name: Robert H. Nelson
                                  Title: Senior V.P.

                             '21' AUTO HOLDINGS, INC.



                             By:    /s/ Robert H. Nelson
                                  ----------------------------
                                  Name: Robert H. Nelson
                                  Title: Vice President


                             /s/ Ezra P. Mager
                             ---------------------------------
                             Ezra P. Mager

                             PREFERRED HOLDERS

                             AENEAS VENTURE CORPORATION



                             By:  /s/ Mark A. Rosen
                                  ----------------------------
                                  Name: Mark A. Rosen
                                  Authorized Signatory



                             By:  /s/ Michael R. Eisenson
                                  ----------------------------
                                  Name: Michael R. Eisenson
                                  Authorized Signatory


                                         -10-


                             AIF II, L.P.

                             By:  Apollo Advisors, L.P.
                                  Managing General Partner

                             By:  Apollo Capital Management, Inc.
                                  General Partner



                             By:  /s/ Michael D. Weiner
                                  ----------------------------
                                  Name: Michael D. Weiner
                                  Title: Vice President



                             NATIO VIE DEVELOPPMENT



                             By:  /s/ D. Bellanger
                                  ----------------------------
                                  Name: D. Bellanger
                                  Title: Portfolio Manager

                             ASSUE VENTURE



                             By:  /s/ D. Bellanger
                                  ----------------------------
                                  Name: D. Bellanger
                                  Title: Portfolio Manager

                             NATIO FONDS VENTURE 2



                             By:  /s/ D. Bellanger
                                  ----------------------------
                                  Name: D. Bellanger
                                  Title: Portfolio Manager



                             /s/ Jeremy Grantham
                             ------------------------------------
                             Jeremy Grantham



                             /s/ Jules Kroll
                             ------------------------------------
                             Jules Kroll


                                         -11-


                             /s/ Andrea Farare
                             ------------------------------------
                             Andrea Farace



                             /s/ Carl Spielvogel
                             ------------------------------------
                             Carl Spielvogel



                             /s/ Jerome Markowitz
                             ------------------------------------
                             Jerome Markowitz



                             /s/ Philip Halperin
                             ------------------------------------
                             Philip Halperin



                             /s/ Derek Lemke-von Ammon
                             ------------------------------------
                             Derek Lemke-von Ammon



                             /s/ Frank Dunlevy
                             ------------------------------------
                             Frank Dunlevy


                                         -12-


The foregoing Agreement is hereby acknowledged, accepted
  and agreed to as of the date first above written:

SENIOR NOTE HOLDERS

J.P. MORGAN CAPITAL CORPORATION



By: /s/ Charles Ewald
    --------------------------------
    Name: Charles Ewald
    Title: 

THE EQUITABLE LIFE ASSURANCE SOCIETY
 OF THE UNITED STATES



By: /s/ U. Peter C. Gummeson
    --------------------------------
    Name: U. Peter C. Gummeson
    Title: Investment Officer


                                         -13-