An extremely long wheelbase version of the 2014 Mercedes E Class facelift was recently spied in Stuttgart, the home of the German carmaker. Because of its dimensions, we can't really call if a "long wheelbase" version. It's basically a full-blown limousine. The prototype seems to be based on the estate version of the 2014 Mercedes E Class, which means it could also be a hearse. We can't know for sure since the rear part of the car is completely camouflaged.