Arias Pistons 12.5:1 Compression 82mm Bore Honda B-series on 2040-parts.com

Mercedes CLA (2013) first official pictures

Mercedes-Benz has revealed its new CLA, a four-door coupe based on the A-class, at an event held in Detroit on the night before this year's motor show opens. But to keep your attention on the big-selling E-class which also makes its debut here, the CLA won't be on Mercedes' show stand, and will make its official public debut at Berlin Fashion Week later this month. Where does the 2013 CLA sit in the Mercedes range?

Detroit auto show: Autoweek editors' picks

The press conferences are over (our feet are killing us), our staff has stopped wrestling, and the ballots are counted. The 2014 Detroit auto show had dozens of never-before-seen cars and trucks gleaming under the Cobo Center lights. Here are the four we, the Autoweek staff, think stood out the most.

Audi S7 Spied

Audi S7 caught out playing We got the launch of the Audi A7 in July and here we are – just a couple of months on – expecting the Audi S7 to surface at the Paris Motor Show next week. And just in time we’ve got a spy shot of the hot S7 out playing and looking pretty much production-ready; as it should if it’s going to bow in next week. It seems clear this is not an A7 with an S-Line pack as it’s sporting a pair of twin exhausts out back which, as far as we can recall, don’t appear on any A7.