See also:

Locking the vehicle (mechanical key)
If the vehicle can no longer be locked with the SmartKey, use the mechanical key. Open the driver's door. Close the front-passenger door, the rear doors and the trunk lid. Press the locking ...

System self-test
The 42 indicator lamp illuminates when you: • turn the SmartKey to position 1 or 2 in the ignition lock • on vehicles with KEYLESS-GO, press the Start/Stop button once or twice The indicator ...

Introduction
Mercedes-Benz recommends that you use genuine Mercedes-Benz parts, conversion parts and accessories that have been approved for the type of vehicle. Mercedes-Benz tests genuine parts as well as co ...