I am 6'7" and have wanted an electric car for years now. My dream car was the Tesla. I drove the B-Class with my wife. It has great head and leg room, good pick up, decent space in the back. Problem was the charging options when not charging at home and the range, 80 miles. On cold days and over time that number will go down and I plan on keeping the car for a while. Nobody will buy that car from me years down the road when it has 50 miles per range in the winter. SOOOO we bought the Tesla and I will go to my grave NOT regretting that, even though I work a couple extra shifts at work in order for it to work out financially.
Hope MB increases range because if they do, but even raise the cost I think they can have a winner. The pick up between the MS and MB is pretty significant even though both are electric, I imagine because of the amount of batteries the MS has.