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                     SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549

                              ---------------


                               SCHEDULE TO/A
                               (RULE 14d-100)
               TENDER OFFER STATEMENT UNDER SECTION 14(d)(1)
         OR SECTION 13(e)(1) OF THE SECURITIES EXCHANGE ACT OF 1934
                             (AMENDMENT NO. 4)

                         DETROIT DIESEL CORPORATION
                     (Name of Subject Company (issuer))

                      DIESEL PROJECT DEVELOPMENT, INC.
                        A WHOLLY OWNED SUBSIDIARY OF
             DAIMLERCHRYSLER NORTH AMERICA HOLDING CORPORATION
                    (Names of Filing Persons (offerors))

                              ---------------


                  COMMON STOCK, PAR VALUE $0.01 PER SHARE
                       (Title of Class of Securities)

                              ---------------


                                 250837101
                   (CUSIP Number of Class of Securities)


                             TIMOTHY P. DYKSTRA
                                 PRESIDENT
             DAIMLERCHRYSLER NORTH AMERICA HOLDING CORPORATION
                            1000 CHRYSLER DRIVE
                     AUBURN HILLS, MICHIGAN 48326-2766
                         TELEPHONE: (248) 512-6130
                   (Name, address and telephone number of
                    person authorized to receive notices
              and communications on behalf of filing persons)

                                  Copy to:
                          J. Michael Schell, Esq.
                          Margaret L. Wolff, Esq.
                  Skadden, Arps, Slate, Meagher & Flom LLP
                             Four Times Square
                          New York, NY 10036-6522
                          Telephone: 212-735-3000


                         CALCULATION OF FILING FEE
=============================================================================
     Transaction Valuation*                         Amount of Filing Fee
         $432,852,571                                   $86,570.52**
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*   For purposes of calculating amount of filing fee only. This amount
    assumes (i) the purchase of all outstanding shares of common stock of
    Detroit Diesel Corporation other than shares beneficially owned by the
    offerors (18,287,490 shares) and (ii) shares of common stock of Detroit
    Diesel Corporation subject to options that will be vested and
    exercisable as of the closing of this offer (532,187 shares). The
    amount of the filing fee calculated in accordance with Rule 0-11 of the
    Securities Exchange Act of 1934, as amended, equals 1/50 of 1% of the
    transaction value.
** This amount has previously been paid.

[_] Check the box if any part of the fee is offset as provided by Rule
    0-11(a)(2) and identify the filing with which the offsetting fee was
    previously paid. Identify the previous filing by registration statement
    number or the Form or Schedule and the date of its filing.

    Amount Previously Paid: N/A             Form or Registration No.: N/A
    Filing party: N/A                       Date Filed: N/A

[_] Check the box if the filing relates solely to preliminary
communications made before the commencement of a tender offer.

Check the appropriate boxes below to designate any transactions to which
the statement relates:

    [X] third-party tender offer subject to Rule 14d-1.

    [_] issuer tender offer subject to Rule 13e-4.

    [_] going-private transaction subject to Rule 13e-3.

    [_] amendment to Schedule 13D under Rule 13d-2.

    Check the following box if the filing is a final amendment reporting
the results of the tender offer: [_]
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         This Amendment No. 4 to the Tender Offer Statement on Schedule TO
(the "Schedule TO"), filed initially with the Securities and Exchange
Commission on July 31, 2000, relates to the third-party tender offer by
Diesel Project Development, Inc. (the "Purchaser"), a Delaware corporation
and a wholly owned subsidiary of DaimlerChrysler North America Holding
Corporation, a Delaware corporation, to purchase all of the shares of
common stock, par value $0.01 per share, of Detroit Diesel Corporation, a
Delaware corporation, at a price of $23.00 per Share, net to the seller in
cash, without interest thereon, upon the terms and subject to the
conditions set forth in the Offer to Purchase, dated July 31, 2000 (the
"Offer to Purchase"), and in the related Letter of Transmittal (which,
together with all amendments or supplements thereto, collectively
constitute the "Offer").

ITEMS 1, 4 AND 11.

         Items 1, 4 and 11 are hereby amended and supplemented to add the
following:

         "On September 12, 2000, DCNA announced that it extended the Offer
         to 5:00 p.m., New York City time, on Monday, September 25, 2000. A
         copy of the press release containing such announcement is filed as
         Exhibit (a)(10) to the Schedule TO and is incorporated herein by
         reference."

ITEM 12.

         Item 12 is hereby amended and supplemented to add the following
exhibit:

         (a)(10) Press Release, dated September 12, 2000.


                                 SIGNATURE

         After due inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete
and correct.

                                       Diesel Project Development, Inc.


                                       By:   /s/ Joachim Drees
                                            ---------------------------------
                                       Name:  Joachim Drees
                                       Title: Vice President and Secretary


                                       DaimlerChrysler North America Holding
                                       Corporation


                                       By: /s/ Timothy P. Dykstra
                                           ----------------------------------
                                       Name:  Timothy P. Dykstra
                                       Title: President


Dated: September 12, 2000



                               EXHIBIT INDEX

(a)(10) Press Release, dated September 12, 2000.