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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.

Tesla planning self-driving car

Tesla are planning a self-driving car Now that car makers have been fitting radar and sensors to their cars for some time, which allow stuff like adaptive cruise – which automatically slows behind traffic and can even bring the car to s stop on its own – the race is on to make cars even more autonomous. We’ve reported recently on the Mercedes Intelligent Drive S-Class that negotiated its way – more or less – on a 60 mile route in Germany, and on Volvo’s self-parking system which will take your car in to a multi storey car park by itself, park, and meet you when you return. Google has also been playing with self-driving cars and has even gained permission to run its autonomous cars in California, and now Tesla are joining the fray with plans for an autonomous car in the next three years.

Infiniti Emerg-E was a Lotus Evora 414E under the skin

Infiniti Emerg-E - it's a Lotus Evora under the skin The Infiniti Emerg-E from the Geneva Motor Show was actually a Lotus Evora 414E under the skin making production more likely. One of the stars of the Geneva Motor Show in March was the stunningly good looking Infiniti Emerg-E, a range-extender sports car from Nissan’s posh arm offering 402bhp from a pair of electric motors and a range-extending 1.2 litre 3-cylinder engine. We knew at Geneva that the 3-cylinder range-extender engine came from Lotus – no surprise as they’ve also supplied the same engine to Jaguar for testing in the XJ Limo Green Hybrid – but what we didn’t know (although we should have worked it out) was that under the skin the Infiniti Emerg-E was actually a Lotus Evora.