The Mercedes-Benz "Concept IAA" (Intelligent Aerodynamic Automobile) four-door coupé which switches automatically from design mode to aerodynamic mode when the vehicle reaches a speed of 50 mph, is powered by a gas/electric plug-in hybrid drive with a total output of 279 horsepower with a top speed of 155 mph (electronically limited) and an all-electric range of 41 miles.
