See also:

Restoring the factory settings
Press the and buttons simultaneously for approximately six seconds until the battery check lamp flashes twice. ...

The M-Class also protects its occupants after a crash
As part of the POST-SAFE® functions, the new M-Class can activate a variety of systems which can contribute towards avoiding post-accident risks. After a more serious crash, the hazard warning lig ...

Switching on/off
WARNING Repeatedly setting the seat heating to level 3 may result in excessive seat temperatures. The health of passengers that have limited temperature sensitivity or a limited ability to r ...