Mercedes-Benz has been toying with alternative-energy prototype vehicles for awhile now, but we're fairly certain this little gem is amongst the most bodacious. The obviously conceptual F-CELL Roadster hearkens back to M-B vehicles of old, though the engine is far from retro. Controlled with drive-by-wire technology and utilizing a joystick rather than a conventional steering wheel, this whip is (theoretically, at least) powered by a 1.2kW emission-free fuel cell system located at the rear. We're
