Mercedes Benz eludes style, charisma, speed, and comfort, all at once. And given just before the big Motor Show at Geneva, the car giants have unveiled images of their latest concept car. Touted to be the sedan of the future, the F800 Style research vehicle has rear doors with a sliding mechanism. And thanks to a swivel arm design, the car does not spot any door rails on the outside, giving it a clean look when the doors are shut. Moreover, the sedan is much wider than the others, making it more comfortably spacious inside. The car will come with a plug-in hybrid or fuel cell drive propulsion for better efficiency. And to finish off the look, the car will have a translucent roof allowing more light to the wood-finished interior.