Mercedes-Benz shows off SLS AMG E-Cell's carbon fiber spine

Filed under: EV/Plug-in, Mercedes Benz, Frankfurt Motor Show, Lightweight We'd thought we were aware of all the details that make up the extraordinary SLS AMG E-Cell, but when Mercedes-Benz revealed the E-Cell's unique aluminum body shell hanging from the ceiling at the 2011 Frankfurt Motor Show, a bit of never-before-seen black stood out. According to M-B, that piece is one of the E-Cell's key...