The plug-in version of the F800 Style has a next-generation, direct-injection 299bhp 3.5-litre V6 petrol engine, mated to an 80kW hybrid module that’s integrated into the seven-speed gearbox. There’s also a lithium-ion battery with over 10kWh of storage capacity, and the F800 can reach 75mph in electric mode – it manages 155mph with petrol power – and return 68g/km.
The all-electric version features a 100kW motor that develops 214lb ft and is powered by a hydrogen full cell and lithium-ion batteries. The technology is a development of the system found in the B-class F-Cell, though adapted for the F800’s rear-drive layout.
The F800 concept also introduces two new technologies that will doubtless appear in upcoming models. Distronic Plus Traffic Jam Assistant is an enhanced version of Mercedes’ active cruise control system, which can now steer the car through curves as long as it’s traveling under 25 mph. Neat. Also new is the Pre-Safe 360-degree system, which expands the existing Pre-Safe collision detection/mitigation system to the rear of the car. Now, if Pre-Safe senses that a rear-end impact is imminent, it’ll apply the brakes in a bid to keep the car from getting into an additional chain-reaction accident involving other cars or pedestrians.
Inside there’s leather and wood trim, magnesium and aluminum seats, and a three-piece sunroof that floods the cabin with light, but much more important are the new gadgets. Top of the list is the latest version of Mercedes’ COMAND multimedia system, with a touchpad similar to that found on the new A8, but with a camera that records the driver’s hand and projects the image onto the screen so he or she can see what they’re about to press.