UNITED STATES
                     SECURITIES AND EXCHANGE COMMISSION
                           WASHINGTON, D.C. 20549

                               SCHEDULE 13D/A

                 UNDER THE SECURITIES EXCHANGE ACT OF 1934
                            (AMENDMENT NO. 13)*


                          United Auto Group, Inc.
------------------------------------------------------------------------------
                              (Name of Issuer)

                Common Stock (Par Value $ 0.0001 Per Share)
    Common Stock (Par Value $ 0.0001 Per Share) Issuable Upon Conversion
          of Series B Preferred Stock and Non Voting Common Stock
                       (Par Value $0.0001 Per Share)
------------------------------------------------------------------------------
                       (Title of Class of Securities)

                                909440 10 9
------------------------------------------------------------------------------
                               (CUSIP Number)

                          Valerie Ford Jacob, Esq.
                  Fried, Frank, Harris, Shriver & Jacobson
                             One New York Plaza
                             New York, NY 10004
                                212-859-8000
------------------------------------------------------------------------------
         (Name, Address and Telephone Number of Persons Authorized
                  to Receive Notices and Communications)

                                May 2, 2002
------------------------------------------------------------------------------
          (Date of Event which Requires Filing of this Statement)


If the filing  person has  previously  filed a statement on Schedule 13G to
report the  acquisition  which is the subject of this  Schedule 13D, and is
filing this schedule because of Rule 13d-1(e),  13d-1(f) or 13d-1(g), check
the following box |_|.

*The  remainder  of this cover  page  shall be filled  out for a  reporting
person's  initial  filing on this form with respect to the subject class of
securities,  and for any subsequent amendment containing  information which
would alter disclosures provided in a prior cover page.

The  information  required on the remainder of this cover page shall not be
deemed to be  "filed"  for the  purpose  of  Section  18 of the  Securities
Exchange  Act of 1934 ("Act") or otherwise  subject to the  liabilities  of
that section of the Act but shall be subject to all other provisions of the
Act (however, see the Notes).



                                  SCHEDULE 13D

CUSIP No. 909440 10 9


---------- ------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    INTERNATIONAL MOTOR CARS GROUP I, L.L.C.

---------- ------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP        (a) |X|
                                                                   (b) |_|

---------- ------------------------------------------------------------------
3          SEC USE ONLY



---------- ------------------------------------------------------------------
4          SOURCE OF FUNDS

                    NOT APPLICABLE

---------- ------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
           PURSUANT TO ITEMS 2(d) or 2(e)                              |_|

                    NOT APPLICABLE
---------- ------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

------------------------- -------- ------------------------------------------
                          7        SOLE VOTING POWER

       NUMBER OF                            9,485,740

         SHARES
                          -------- ------------------------------------------
      BENEFICIALLY        8        SHARED VOTING POWER

        OWNED BY                            0
                          -------- ------------------------------------------
                          9        SOLE DISPOSITIVE POWER
          EACH
                                            9,485,740
       REPORTING

                          -------- ------------------------------------------
         PERSON           10       SHARED DISPOSITIVE POWER

          WITH                              0
---------- ------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    23,106,135

---------- ------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                                             |_|


---------- ------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    55.0%

---------- ------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

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





                                  SCHEDULE 13D

CUSIP No. 909440 10 9

---------- ------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    INTERNATIONAL MOTOR CARS GROUP II, L.L.C.


---------- ------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                 (a) |X|
                                                                 (b) |_|

---------- ------------------------------------------------------------------
3          SEC USE ONLY



---------- ------------------------------------------------------------------
4          SOURCE OF FUNDS

                    NOT APPLICABLE

---------- ------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
           PURSUANT TO ITEMS 2(d) or 2(e)                            |_|

                    NOT APPLICABLE

---------- -------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

------------------------- -------- -------------------------------------------
                          7        SOLE VOTING POWER

       NUMBER OF                            3,231,857

         SHARES
                          -------- -------------------------------------------
      BENEFICIALLY        8        SHARED VOTING POWER

        OWNED BY                            0

                          -------- -------------------------------------------
                          9        SOLE DISPOSITIVE POWER
          EACH
                                            3,231,857
       REPORTING

                          -------- -------------------------------------------
         PERSON           10       SHARED DISPOSITIVE POWER

          WITH                              0

---------- -------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    23,106,135


---------- -------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                                             |_|


---------- -------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    55.0%

---------- -------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

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





                                  SCHEDULE 13D

CUSIP No. 909440 10 9

---------- -------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    PENSKE CAPITAL PARTNERS, L.L.C.


---------- -------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                 (a) |X|
                                                                 (b) |_|

---------- -------------------------------------------------------------------
3          SEC USE ONLY



---------- -------------------------------------------------------------------
4          SOURCE OF FUNDS

                    NOT APPLICABLE


---------- -------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
           PURSUANT TO ITEMS 2(d) or 2(e)                           |_|

                    NOT APPLICABLE
---------- -------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

------------------------- -------- -------------------------------------------
                          7        SOLE VOTING POWER

       NUMBER OF                            12,717,597

         SHARES
                          -------- -------------------------------------------
      BENEFICIALLY        8        SHARED VOTING POWER

        OWNED BY                            0

                          -------- -------------------------------------------
                          9        SOLE DISPOSITIVE POWER
          EACH
                                            363,400
       REPORTING

                          -------- -------------------------------------------
         PERSON           10       SHARED DISPOSITIVE POWER

          WITH                              12,354,197

---------- -------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    23,106,135

---------- -------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                                         |_|


---------- -------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    55.0%


---------- -------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

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





                                  SCHEDULE 13D

CUSIP No. 909440 10 9

---------- -------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    JAMES A. HISLOP

---------- -------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a) |X|
                                                               (b) |_|

---------- -------------------------------------------------------------------
3          SEC USE ONLY



---------- -------------------------------------------------------------------
4          SOURCE OF FUNDS

                    NOT APPLICABLE

---------- -------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
           PURSUANT TO ITEMS 2(d) or 2(e)                          |_|

                    NOT APPLICABLE

---------- -------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    UNITED STATES

------------------------- -------- -------------------------------------------
                          7        SOLE VOTING POWER

       NUMBER OF                            50,000

         SHARES
                          -------- -------------------------------------------
      BENEFICIALLY        8        SHARED VOTING POWER

        OWNED BY                            12,717,597

                          -------- -------------------------------------------
                          9        SOLE DISPOSITIVE POWER
          EACH
                                            50,000
       REPORTING

                          -------- -------------------------------------------
         PERSON           10       SHARED DISPOSITIVE POWER

          WITH                              12,717,597

---------- -------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    23,106,135


---------- -------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                                          |_|


---------- -------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    55.0%

---------- -------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    IN

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





                                  SCHEDULE 13D
CUSIP No. 909440 10 9

---------- -------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    ROGER S. PENSKE


---------- -------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                 (a) |X|
                                                                 (b) |_|

---------- -------------------------------------------------------------------
3          SEC USE ONLY



---------- -------------------------------------------------------------------
4          SOURCE OF FUNDS

                    NOT APPLICABLE

---------- -------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
           PURSUANT TO ITEMS 2(d) or 2(e)                            |_|

                    NOT APPLICABLE

---------- -------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    UNITED STATES

------------------------- -------- -------------------------------------------
                          7        SOLE VOTING POWER

       NUMBER OF                            441,667

         SHARES
                          -------- -------------------------------------------
      BENEFICIALLY        8        SHARED VOTING POWER

        OWNED BY                            22,614,468

                          -------- -------------------------------------------
                          9        SOLE DISPOSITIVE POWER
          EACH
                                            441,667
       REPORTING

                          -------- -------------------------------------------
         PERSON           10       SHARED DISPOSITIVE POWER

          WITH                              22,614,468

---------- -------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    23,106,135


---------- -------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                                          |_|

---------- -------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    55.0%

---------- -------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    IN

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





                                  SCHEDULE 13D

CUSIP No. 909440 10 9

---------- -------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    PENSKE CORPORATION


---------- -------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                               (a) |_|
                                                               (b) |X|

---------- -------------------------------------------------------------------
3          SEC USE ONLY



---------- -------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC

---------- -------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
           PURSUANT TO ITEMS 2(d) or 2(e)                         |_|

                    NOT APPLICABLE
---------- -------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

------------------------- -------- -------------------------------------------
                          7        SOLE VOTING POWER

       NUMBER OF                            9,896,871

         SHARES
                          -------- -------------------------------------------
      BENEFICIALLY        8        SHARED VOTING POWER

        OWNED BY                            0

                          -------- -------------------------------------------
                          9        SOLE DISPOSITIVE POWER
          EACH
                                            9,896,871
       REPORTING

                          -------- -------------------------------------------
         PERSON           10       SHARED DISPOSITIVE POWER

          WITH                              5,863,678

---------- -------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    23,106,135


---------- -------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                                         |_|

---------- -------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    55.0%

---------- -------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    CO

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




          This Amendment No. 13 ("Amendment") amends and supplements the
Schedule 13D filed on behalf of International Motor Cars Group I, L.L.C., a
Delaware limited liability company ("IMCG I"), International Motor Cars
Group II, L.L.C., a Delaware limited liability company ("IMCG II" and
together with IMCG I, the "Purchasers"), Penske Capital Partners, L.L.C., a
Delaware limited liability company ("PCP"), Penske Corporation, a Delaware
corporation ("Penske Corporation"), Roger S. Penske and James A. Hislop
(all such persons, the "Reporting Persons") with the Securities and
Exchange Commission on April 22, 1999, as amended by Amendment No. 1 filed
on May 3, 1999, Amendment No. 2 filed on August 5, 1999, Amendment No. 3
filed on February 9, 2000, Amendment No. 4 filed on September 12, 2000,
Amendment No. 5 filed on October 26, 2000, Amendment No. 6 filed on
December 18, 2000, Amendment No. 7 filed on December 26, 2000, Amendment
No. 8 filed on February 14, 2001, Amendment No. 9 filed on March 6, 2001,
Amendment No. 10 filed on August 7, 2001, Amendment No. 11 filed on March
1, 2002, and Amendment No. 12 filed on March 27, 2002 (the "Schedule 13D"),
relating to the Voting Common Stock, par value $0.0001 per share (the
"Voting Common Stock"), of United Auto Group, Inc., a Delaware corporation
(the "Company"). Capitalized terms used but not otherwise defined herein
shall have the meanings ascribed to such terms in the Schedule 13D. The
Schedule 13D is hereby amended and supplemented as follows:


ITEM 5.   INTERESTS IN SECURITIES OF THE ISSUER.

          The Reporting Persons were advised by the Company that as of May
13, 2002 there were 39,831,582 shares of Voting Common Stock outstanding
(not including any securities convertible into Voting Common Stock).

          (a) On May 2, 2002, in accordance with the Certificate of
Designation of the Series A Preferred Stock, (x) IMCG I converted 5,450.106
shares of Series A Preferred Stock owned of record by it and acquired
direct ownership of the 5,570,160 shares of Voting Common Stock (which
includes 120,054 shares of Voting Common Stock received in lieu of cash
dividends accrued on the outstanding shares of Series A Preferred Stock
since December 31, 2001) and (y) IMCG II converted 1,431.340 shares of
Series A Preferred Stock owned of record by it and acquired direct
ownership of 1,462,869 shares of Voting Common Stock (which includes 31,529
shares of Voting Common Stock received in lieu of cash dividends
accrued on the outstanding shares of Series A Preferred Stock since
December 31, 2001).

          As of May 2, 2002, as a result of the transactions previously
reported on this Schedule 13D and the accrual of 14,287 shares of
Non-Voting Common Stock to be received in lieu of cash dividends accrued on
the outstanding shares of Series B Preferred Stock since December 31, 2001,
if, and only if, the Series B Preferred Stock is converted prior to the
payment of the accrued cash dividends, the Reporting Persons may be deemed
to be the beneficial owners of an aggregate of 23,106,135 shares of Voting
Common Stock, which constitutes approximately 55.0% of the 42,022,237
shares of Voting Common Stock deemed to be outstanding for this purpose.
The 42,022,237 shares deemed to be outstanding was determined by adding the
39,831,582 shares of Voting Common Stock outstanding as of May 13, 2002 to
the 2,190,655 shares of Voting Common Stock into which the securities
reported as beneficially owned by the Reporting Persons are convertible.

          As of May 2, 2002, taking into account only those securities held
by the Reporting Persons that are currently outstanding and have voting
rights, the Reporting Persons held approximately 52.5% of the voting power
with respect to matters coming before the holders of the Voting Common
Stock.

          (b) As of May 2, 2002, assuming the conversion into Voting Common
Stock of the Series B Preferred Stock and the shares of Non-Voting Common
Stock, IMCG I has the sole power to direct the vote of 9,485,740 shares of
Voting Common Stock, and IMCG II has the sole power to direct the vote of
3,231,857 shares of Voting Common Stock, in each case subject to certain
restrictions contained in the Restated Stockholders Agreement. PCP has the
sole power to direct the vote of 12,717,597 shares of Voting Common Stock.
Penske Corporation has the sole power to direct the vote of 9,896,871
shares of Voting Common Stock. Roger S. Penske has the sole power to direct
the vote of 20,000 shares of Voting Common Stock, and, upon (x) the
exercise of the Second Closing Options, (y) the exercise of a portion of an
option (such portion covering 16,667 shares of Voting Common Stock)
previously granted to Roger S. Penske, which portion vested in part on
January 14, 2001 and in part on January 14, 2002, and (z) the exercise of a
portion of an option (such portion covering 5,000 shares of Voting Common
Stock) previously granted to Roger S. Penske, which portion vested on
February 28, 2002, Roger S. Penske will have the sole power to direct the
vote of an aggregate of 441,667 shares of Voting Common Stock and shared
power to direct the vote of 22,614,468 shares of Voting Common Stock. James
A. Hislop has the sole power to direct the vote of 50,000 shares of Voting
Common Stock and shared power to direct the vote of 12,717,597 shares of
Voting Common Stock.

          As of May 2, 2002, subject to certain restrictions contained in
the IMCG I Letter Agreement and the IMCG II Letter Agreement, as
applicable:

          o    IMCG I has the sole power to direct the disposition of
               9,485,740 shares of Voting Common Stock,

          o    IMCG II has the sole power to direct the disposition of
               3,231,857 shares of Voting Common Stock,

          o    Penske Corporation has the sole power to direct the
               disposition of 9,896,871 shares of Voting Common Stock and
               the shared power to direct the disposition of 5,863,678
               shares of Voting Common Stock,

          o    PCP has the sole power to direct the disposition of 363,400
               shares of Voting Common Stock and the shared power to direct
               the disposition of 12,354,197 shares of Voting Common Stock,

          o    Roger S. Penske has the sole power to direct the disposition
               of 20,000 shares of Voting Common Stock, and, upon (x) the
               exercise of the Second Closing Options, (y) the exercise of
               portions of an option (such portion covering 16,667 shares
               of Voting Common Stock) previously granted to Roger S.
               Penske, which portion vested in part on January 14, 2001 and
               January 14, 2000, respectively and (z) the exercise of a
               portion of an option (such portion covering 5,000 shares of
               Voting Common Stock) previously granted to Roger S. Penske,
               which portion vested on February 28, 2002, Roger S. Penske
               will have the sole power to direct the disposition of an
               aggregate of 441,667 shares of Voting Common Stock and the
               shared power to direct the disposition of 22,614,468 shares
               of Voting Common Stock, and

          o    James A. Hislop has the sole power to direct the disposition
               of 50,000 shares of Voting Common Stock and the shared power
               to direct the disposition of 12,717,597 shares of Voting
               Common Stock.


          Except as described herein, none of the Reporting Persons have
effected any transactions in the Voting Common Stock since March 27, 2002,
the date of filing of the twelfth amendment to this Schedule 13D.



          After reasonable 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.

May 13, 2002


                               INTERNATIONAL MOTOR CARS GROUP I, L.L.C.


                                    By:  PENSKE CAPITAL PARTNERS, L.L.C.
                                         Its Managing Member



                                         By:  /s/ James A. Hislop
                                              ------------------------
                                              James A. Hislop
                                              President



          After reasonable 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.

May 13, 2002


                                INTERNATIONAL MOTOR CARS GROUP II, L.L.C.


                                    By:  PENSKE CAPITAL PARTNERS, L.L.C.
                                         Its Managing Member



                                         By:  /s/ James A. Hislop
                                              ------------------------
                                              James A. Hislop
                                              President





          After reasonable 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.

May 13, 2002


                                    PENSKE CAPITAL PARTNERS, L.L.C.



                                         By:  /s/ James A. Hislop
                                              ------------------------
                                              James A. Hislop
                                              President






          After reasonable 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.

May 13, 2002






                                     /s/ James A. Hislop
                                     -----------------------------------
                                     James A. Hislop



          After reasonable 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.

May 13, 2002






                                      /s/ Roger S. Penske
                                      -----------------------------------
                                      Roger S. Penske



          After reasonable 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.

May 13, 2002


                                 PENSKE CORPORATION



                                      By:/s/ Robert Kurnick
                                         ----------------------------------
                                           Name:   Robert Kurnick
                                           Title:  Executive Vice President