Can you program keys with Xentry?
Mercedes dealers have a scan tool (Xentry) that only them have and can reprogram keys with. They can not reprogram an existing key thats been assigned to a vehicle. New blank keys can be programmed once, and once only. Key Fob Replacement & Programming Losing a Mercedes-Benz key means more than just cutting a new one—it must be programmed to match your car’s ECU. A professional locksmith with Mercedes-Benz experience can reprogram or replace the key fob to get you back on the road.