See also:

Mounting dimensions
WARNING Only have a trailer tow hitch retrofitted at a qualified specialist workshop which has the necessary specialist knowledge and tools to carry out the work required. Mercedes-Benz reco ...

Mercedes-Benz M-Class Owners Manual
...

Important safety notes
WARNING   If you tow the vehicle, you must use a rigid towing bar if: • the engine is not running. • there is a brake system malfunction. • there is a malfunction in the power suppl ...