Mercedes unveiled its new 2017 E-Class at the 2016 Detroit Auto Show this week and announced the details of its new plug-in hybrid powertrain option: 350e.  While Mercedes is working on 4 new all-electric vehicles to be released before the end of the decade, the automaker is introducing more electric hybrid powertrains in its established lineup of luxury vehicles and the 350e is the first we get to see. expand full story