When Mercedes-Benz showed the SLS AMG at the 2009 Frankfurt auto show, the company also said it was working on an electric version of the car. Development appears to be progressing well, as Mercedes-Benz releases photos and specs for this super green car, dubbed the SLS AMG E-Cell.
The SLS AMG E-Cell uses four electric motors, one at each wheel, giving the car all-wheel-drive. Mercedes-Benz points out that it did not use hub motors, which would have added unsprung weight. Instead, the motors are set back on the car's suspension, with short axles driving the wheels.
Mercedes-Benz uses LED headlights to save power for driving. The gasoline-powered SLS AMG has a double wishbone front suspension, but that had to be replaced with a multilink suspension to accommodate the front drive motors. All four motors combine to give the car 526 horsepower and 649 pound-feet of torque.
The rear spoiler automatically deploys at speeds over 75 mph. The SLS AMG E-Cell's front diffuser also lowers at this speed, reducing the amount of air under the car. The lack of a tailpipe meant the rear diffuser could be given a steeper angle.
This diagram shows the car's powertrain layout. The battery pack is made up of 320 lithium-ion polymer cells containing 48 kilowatt-hours of electricity. Mercedes-Benz has not given a range for the car, but its zero to 60 mph acceleration is 4 seconds. The gasoline version of the car hits 60 mph in 3.7 seconds.