See also:

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

Operation
Depending on the date of manufacture of your vehicle, the or symbol for the automatic headlamp mode/daytime running lamps is located on the light switch. Illustration: light switch with th ...

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 ...