The concept

This system issues a warning at speeds above approx. 40 mph/65 km/h if the vehicle is about to leave the lane on roads with lane markings.

The steering wheel begins vibrating lightly.

The system does not issue a warning if the turn signal is set before leaving the lane.

    See also:

    Indicator/warning lamps
    The indicator lamp flashes: DSC controls the drive forces and brake forces. The indicator lamp lights up: DSC has failed. ...

    Deactivating HDC
    Press the button again and the LED goes out. HDC is automatically deactivated above approx. 37 mph/60 km/h. ...

    Configuring the warning time
    After the warning function is switched on, the warning time can be set via the iDrive. For a late warning time, prewarning is deactivated. These settings have no effect on the time of the warni ...