Mercedes-Benz has a 526 horsepower electric drivetrain in the upcoming SLS AMG E-Cell supercar. Power for the E-Cell will be provided by four electric motors. The E-Cell employs a permanent all-wheel drive system which is powered by a 400-volt battery made up of 12 modules of 72 lithium-ion polymer cells. The battery is housed in within the carbon fiber transmission tunnel, which is structurally integrated into the E-Cell’s aluminum body shell. This is a 2013 model year vehicle expected to hit the roads in the fall of 2012.