Clearing the memory of the integrated garage door opener on the rear-view mirror
•► Turn the SmartKey to position 2 in the ignition lock.
•► Press transmitter buttons 2 and 4.
The indicator lamp lights up yellow.
•► Press and hold transmitter buttons 2 and 4 until the indicator lamp turns green.
Make sure that you clear the memory of the integrated garage door opener before selling the vehicle.
See also:
Mercedes-Benz M-Class Owners Manual
...
General notes
If you cannot lock or unlock the vehicle with
the SmartKey, either the battery in the
SmartKey is discharged, the SmartKey is
faulty or the starter battery is discharged.
Check the battery in ...
Shifting to transmission position D
•► When the vehicle is stationary, depress the
brake pedal.•► Push the DIRECT SELECT lever down past
the first point of resistance. ...
