Mercedes-Benz Concept A car (TIMOTHY A. CLARY/AFP/Getty Images)
Mercedes-Benz Concept A-Class first premiered at the auto show in Shanghai, China earlier this week. It has a turbo-charged 4-cylinder engine, a dual-clutch transmission and large 20-inch wheels. (REUTERS/Jessica Rinaldi)
A photographer takes a picture of a model standing next to a Toyota Racing car at the New York International Auto Show in New York City, April 20, 2011. (JESSICA RINALDI/JESSICA RINALDI/Reuters)
Volkswagen Bulli Microbus concept model. It seats six on bench seats that fold down into a large reclining surface. (Spencer Platt/Spencer Platt/Getty Images)