CCM News, New York. Mercedes-Benz goes green. In just a few months the smart electric drive will come to the US and so is the Mercedes-Benz B-Class Fuel Cell. End of June David Coulthard drove the SLS E-Cell in Norway where the vehicle is currently undergoing intensive testing for its possible market launch as early as 2013. Electric cars are not the only solution for low emission diving - hybrids and particular diesel-hybrids are high on the list of all automakers.