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The first SRT Viper is sold, we spot an exotic XTS, and the 2013 SVT Raptor offers more off-road fun, this week's Autoweek in review

The first SRT Viper crossed the block at Barrett Jackson in Orange County this past week, for a cool $300,000. All the proceeds will go to the Austin Hatcher Foundation, a charity to help families and children affected by pediatric cancer. While the Cadillac XTS hasn't been a stranger on public roads around Michigan, this heavily camouflaged example is a bit of a mystery.

Not every Chrysler dealer gets to sell SRT Viper

The redesigned 2013 SRT Viper will be sold at about one in five Chrysler Group dealerships, says Ralph Gilles, head of the high-performance SRT brand. To qualify for the sports car, dealerships will have to train staff, buy special tools and improve their facilities. "We're going to open it up to any dealer who can put the money forward and the training, but it's going to be pretty difficult to hit all of those things," Gilles said during a broadcast interview with journalists in Detroit this month.

Mercedes SLS AMG Roadster revealed ahead of Frankfurt

Mercedes SLS AMG Roadster - this time it's undisguised You might have thought that the photos of the Mercedes SLS AMG Roadster we published a couple of weeks back were the official reveal of the soft-top SLS. But you’d be wrong. Those photos were in fact of a disguised SLS Roadster (although you’d have to look hard to see what was hidden).