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Solar-powered Ford C-Max Solar Energi revealed

Plug-in Hybrid Vehicles (PHVs) are the next big thing in environmentally conscious motoring – and the number on sale is set to explode over the coming months. But some carmakers are already working on the next next big thing. Including Ford, which has just announced this new C-Max Solar Energi Concept.

NHTSA studies Toyota Corolla airbags

Federal regulators are investigating a motorist's report that the airbags in his 2008 Toyota Corolla failed to deploy when the vehicle hit a deer at 55 mph. The National Highway Traffic Safety Administration said this week that the airbag probe could affect as many as 170,000 vehicles. The Corolla has been Toyota's second-best selling model, after the Camry, in recent years.

Video: The Making of the Mercedes-Benz AMG Vision Gran Turismo

In a new video exploring the design of the AMG Vision Gran Turismo, Mercedes-Benz designers speak of their excitement at designing without restrictions. The video, which features figures such as design vice-president Gorden Wagener, traces the car's development from the sketch phase to the final model – unveiled at last month's Los Angeles auto show. Steffen Köhl, director advanced design global, says, "We had the mix between the very far away showcar design – free and pure emotion – and a car that reacts realistically in the game." "The most stunning aspect of this car is the proportion.