The BMW i3 EV does offer Type-3/Level-3 (L3) SAE combo (ccs) charging
capability, but is not compatible with the well established in the U.S.
CHAdeMO L3 EVSE the Leaf EV uses
http://www.plugincars.com/bmw-i3.html
(under charging)
The MB EV does not have L3, but does have a 10kW on-board charger
ht
The BMW is 1000 pounds lighter with a much smaller battery pack. Both vehicles
are well made. However neither model as far as I can see allow fast charging.
So the Nissan Leaf is the only EV available for sale with the possibility of
long range driving in a timely fashion. Lawrence Rhodes
http://www.caranddriver.com/comparisons/2014-bmw-i3-vs-2014-mercedes-benz-b-class-electric-drive-comparison-test
2014 BMW i3 vs. 2014 Mercedes-Benz B-class Electric Drive - Comparison Tests
September 2014 BY JOHN PEARLEY HUFFMAN
[images / PHOTOGRAPHY BY ROBERT KERIAN
http://www.caranddriver.com