It will work when the key is cycled and the head unit is restarted.
It should be coded with the factory SDS machine, otherwise there could
be intermittant audio issues with the system and a current fault code.
It should....should work anyways.
DR.D

__________________
Dr.Diesel -
Shop Foreman
Master Guild Mercedes-Benz Technician.

Think the dealer is expensive? Do you know how much it costs to train a dealer tech? Or buy the required MB special tools to have on hand?