Exhibit 15

Zurich, 10 November 2011

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in each of the following registration statements of UBS AG:

(1)	on Form F-3 (Registration Numbers 333-156695; 333-156695-01 to —17; and 333-153882), and each related prospectus currently outstanding under any of the aforementioned registration statements,
(2)	on Form S-8 (Registration Numbers 333-57878; 333-50320; 333-49216; 333-49214; 33-49212; 333-49210; 333-103956; 333-127180; 333-127182; 333-127183; 333-127184; 333-162798; 333-162799; and 333-162800), and each related prospectus currently outstanding under any of the aforementioned registration statements,
(3)	the base prospectus of Corporate Asset Backed Corporation (CABCO) dated 23 June 2004 (Registration Number 333-111572),
(4)	the Form 8-K of CABCO dated 23 June 2004 (SEC File Number 001-13444), and
(5)	the Prospectus Supplements relating to the CABCO Series 2004-101 Trust dated 10 May 2004 (Registration Number 033-91744) and 13 May 2004 (Registration Number 033-91744-05),

of our report dated 3 March 2011 (except for the matter described in the seventh paragraph of our report on the effectiveness of internal control over financial reporting, as to which the date is 10 November 2011) with respect to the consolidated financial statements of UBS AG, and our report dated 3 March 2011 (except for the matter described in the sixth paragraph of our report, as to which the date is 10 November 2011) with respect to the effectiveness of internal control over financial reporting of UBS AG, included in its Annual Report (Form 20-F), as amended by Amendment No. 1 (Form 20-F/A), for the year ended 31 December 2010, filed with the Securities and Exchange Commission.

Ernst & Young Ltd

Jonathan Bourne	Andreas Loetscher
Licensed Audit Expert	Licensed Audit Expert