No idea at all but given these cars are in some way modular one would think it possible to replace the onboard charger with the new 11kw charger, that it would be a fairly simple unhook and reinstall, and then update the software but like many thinks I suspect it may be rather expensive. Also is there a need to replace wiring between the the charger and battery? I would ask a dealer in the first instance and ask them to ask Mercedes for the technicality of it worht a try as if there is a market for such upgrade mercedes may be interersted.