North American International Auto Show 2012 - in pictures

Reporters check out the 2013 Cadillac ATS Photograph: Tannen Maury/EPA

A reporter examines the interior of the 2013 Cadillac ATS Photograph: Tannen Maury/EPA

General Motors president Mark Reuss applauds as the 2013 Cadillac ATS is introduced at a special presentation Photograph: Tannen Maury/EPA

Dieter Zetsche, chairman of the board of management of Daimler AG and head of Mercedes-Benz Cars, speaks during the 2013 SL-Class world premiere Photograph: Mike Cassese/Reuters

People look at one of the new Mercedes-Benz SL line of cars Photograph: Larry W Smith/EPA

A detail of the new Mercedes-Benz SL Photograph: Stan Honda/AFP/Getty Images

Mercedes-Benz introduces their new SL convertible during a media preview Photograph: Scott Olson/Getty Images

A vintage Mercedes 300 SL on display Photograph: Stan Honda/AFP/Getty Images

The BMW i8 Concept on display at the BMW exhibit Photograph: Bryan Mitchell/AP

Daimler introduces the "Smart For Us" an "urban pickup" electric concept vehicle Photograph: Geoff Robins/AFP/Getty Images

The Chevrolet Camaro Hot Wheels concept car – just don't try to loop-the-loop Photograph: Paul Sancya/AP

A Bentley Mulsanne Photograph: Mike Cassese/Reuters

Stefan Jacoby, president and chief executive of Volvo, holds an electrical cord in the outlet for the Volvo XC-60 Plug-in hybrid concept car Photograph: Stan Honda/AFP/Getty Images

Photographers surround the Acura NSX concept car from Honda Photograph: Geoff Robins/AFP/Getty Images

Dr Ulrich Hackenberg, member of Volkswagen's management board for technical development, sits in the VW E-Bugster Photograph: Mike Cassese/Reuters

The BMW i8 concept Photograph: Bryan Mitchell/AP

The 2012 Lexus LF-LC concept car Photograph: Geoff Robins/AFP/Getty Images

The Audi R8 GT is displayed on the floor Photograph: Carlos Osorio/AP

The Honda Accord concept vehicle on display Photograph: Geoff Robins/AFP/Getty Images

Harold Wester, CEO of Maserati SPA introduces the Kubang sport luxury SUV concept Photograph: Carlos Osorio/AP

The new Porsche 911 Carrera Cabriolet goes on display Photograph: Scott Olson/Getty Images

A Via electrified truck Photograph: Stan Honda/AFP/Getty Images

The Nissan Leaf electric vehicle during the final press preview day Photograph: Mike Cassese/Reuters

The Falcon sports car Photograph: Stan Honda/AFP/Getty Images

The charging cable on a Toyota Prius plug-in hybrid car Photograph: Stan Honda/AFP/Getty Images

A 2013 Porsche 911 Carrera convertible is reflected in the mirror of another vehicle Photograph: Mike Cassese/Reuters