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Have your Shelby Mustang GT350 or GT500 Super Snake shipped for free

Shelby American is adding a little incentive to pick up one of its one-off Ford Mustang creations: Buyers won’t have to pay shipping on the 2012 Shelby GT350 and the 2007-12 Shelby GT500 Super Snake--as long as they order by July 31. Depending on where a buyer lives, that could be a savings of up to $1,500. For the uninitiated, Shelby American revamps almost everything mechanical on the Ford Mustang to create the GT350, including front and rear suspension, brakes and intake and exhaust systems.

Mercedes-AMG GT shows off its interior in New York

We're getting our first official look at elements of the upcoming Mercedes-AMG GT sports car ahead of an expected September debut. The new two-seater, originally rumored to be called the Mercedes-Benz SLC, indirectly replaces the SLS AMG, becoming the second stand-alone model to be conceived, engineered and produced by Mercedes' AMG performance car offshoot at its headquarters in Affalterbach on the outskirts of Stuttgart, Germany. Mercedes has controversially eschewed any traditional reference to one of its founders, Karl Benz, in the name of its new 500-hp-plus twin-turbocharged 4.0-liter V8-powered machine.

Volkswagen XL1

This, remarkably, is the production version of the Volkswagen XL1, the most fuel-efficient production car in the world, a car we'll see in Geneva in a little over a week. Barely changed from the concept version shown at the Qatar motor show two years ago, the production XL1 is the first production result of VW's 1-liter project – to design a car that uses less than 1l/100km (282.5mpg imperial) – that started with the lozenge-shaped, tandem-seat 2003 1L and the later L1 of 2009. The XL1 actually beats that by sipping just 0.9 liters with CO2 emissions of 21g/km.