The F 015 is a sort of collage of futuristic technological concepts. The smooth, pod-like car is driven by a fuel cell hybrid powertrain that powers the car (on paper at least) up to 684 zero-emission miles (1,100 km), 560 (900 km) of these on fuel cell-derived electricity and 124 (200 km) on battery power. Mercedes gives no indication as to what specific combination of batteries, fuel cells and motors supports that lofty claim, though.
Source: Mercedes F 015 luxury car price, features and releasing date