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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.

Mazda MX-5 Kuro Edition (2012) first official pictures

Mazda has unveiled another sporty special edition MX-5, hot on the heels of yesterday's track-focused MX-5 GT Concept. The new member of the family is the Kuro Edition, and is marked out by racy detailsing, bespoke graphics, and can be had with enticing finance options for a limited time. Mazda MX-5 Kuro: what's in a name?

Audi A5 gets new TDIe engines & SE Technik spec

Audi A5 TDIe offers more efficient engines in Sportback & Coupe Audi has made the A5 Coupe and Sportback even more efficient with two new TDIe engines and SE Technik specification option. We’ve only just reported the powerful BiTurbo 3.0 litre diesel engines for the Audi A6 and A7, and now we get news from Audi of diesel engines at the other end of the spectrum with new, more efficient TDIe engines for the Audi A5 Coupe and A5 Sportback. The new efficient TDIe engines come in either a 136PS or 163PS versions, with fuel economy as impressive as 64.2mpg in the A5 Sportback 2.0 TDIe 136PS.