See also:

Mercedes-Benz M-Class Owners Manual
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AMG vehicles with rear axle locking differential
Your vehicle is equipped with a self-locking differential on the rear axle. For better protection of the differential on the rear axle, carry out an oil change after a breaking-in phase of 200 ...

Opening/closing the garage door
Once programmed, the integrated garage door opener will assume the function of the garage door system's remote control. Please also read the operating instructions for the garage door system. ...