RM Sotheby's is auctioning a rare 2002 Mercedes-Benz CLK-GTR Roadster, part of the limited production of 28 roadworthy CLK GTRs. The roof-free version was produced later and prepared by HWA, an entity started by Hans-Werner Aufrecht. This particular CLK GTR Roadster, numbered 3 of 6, has just over 100 miles and is estimated to be sold for $10.5 to $13 million.