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Meet the new Mercedes-Benz SL400

This is our first photo of the upcoming Mercedes-Benz SL400 luxury roadster, a model that effectively replaces the SL350 as part of a series of subtle changes brought to the SL lineup. The move aims to goose sales of the luxury roadster two years after it first hit showrooms. The SL400 is powered by Mercedes-Benz's twin-turbocharged 3.0-liter V6 direct-injection gasoline engine unveiled in the E400 early last year.

Video: The Porsche Panamera Sport Turismo concept build process

Porsche has released a video featuring Style Director Michael Mauer charting the design process of the Panamera Sport Turismo concept. The 10-minute YouTube video, which also features General Manager Advanced Design Style Mitja Rorkert, follows the build process through each modeling phase right up until the presentation of the show car at this year's Paris motor show. "It always presents a special challenge when we develop a new kind of car for the Porsche brand," says Mauer, "precisely because we haven't been in the segment before, and the question of whether it matches the Porsche brand always looms in the background." We were impressed at the Panamera Sport Turismo concept's unveiling, particularly with its stance and detail execution, so the video is a chance to see just how this concept came into being.

Aston Martin V12 Zagato

The new Aston Martin V12 Zagato has been unveiled ahead of its official debut at the Concorso d'Eleganza this weekend. This latest concept marks the revival Aston Martin's long-standing collaboration with the famed coachbuilder in the 50th anniversary year of the iconic DB4GT. Based on the V12 Vantage, the Zagato model features the coachbuilder's defining 'double bubble' roof and a new handcrafted aluminum body, which was formed using an English wheel and traditionally crafted body bucks.