FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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(Print or Type Responses)

1. Name and Address of Reporting Person * PENSKE CORP   2. Issuer Name and Ticker or Trading Symbol UNITED AUTO GROUP INC [UAG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2555 TELEGRAPH ROAD 3. Date of Earliest Transaction (Month/Day/Year) 03/09/2006 (Street) BLOOMFIELD HILLS, MI 48302 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/09/2006   P(1)   460,000 A $ 42.82 11,154,021 (2) (3) I By Subsidiary

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
PENSKE CORP 2555 TELEGRAPH ROAD BLOOMFIELD HILLS, MI 48302		X

Signatures

/s/ Robert H. Kurnick, Jr., President		03/09/2006
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	These 460,000 securities were purchased by a subsidiary of Penske Corporation from Roger S. Penske.
(2)	Penske Corporation also reports beneficial ownership of 7,478,386 shares of Voting Common Stock attributable to Penske Corporation's ownership interest in International Motor Cars Group I, L.L.C. ("IMCG I"). Penske Corporation is a non-managing member of IMCG I. Pursuant to the IMCG I operating agreement, the number of shares of equity securities of the Company attributable to Penske Corporation's membership interest in IMCG I shall be reduced at the time of each distribution made by IMCG I to Penske Corporation by the number of shares actually distributed to Penske Corporation and by the number of shares representing the carried interest, if any, attributable to the managing member of IMCG I.
(3)	Penske Corporation disclaims beneficial ownership of the securities held by IMCG I, except to the extent of its "pecuniary interest" (as such term is defined in Rule 16a-1 under the Securities Exchange Act of 1934, as amended), if any, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities for Section 16 purposes and for all other purposes.

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