Starting procedure with the SmartKey

SmartKeyTo start the engine using the SmartKey instead of KEYLESS-GO, pull the Start/Stop button out of the ignition lock.

in the Turn the SmartKey to position 3 in the ignition lock and release it as soon as the engine is running.

    See also:

    Tire tread
    WARNING   Although the applicable federal motor vehicle safety laws consider a tire to be worn when the tread wear indicators (TWI) become visible at approximately 1/16 in (1.6 mm), we r ...

    Mercedes-Benz M-Class Owners Manual
    ...

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