See also:

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 ...

Activating HDC
Press the button; the LED above the button lights up. ...

Malfunction
In the event of a failure or malfunction of the parking brake, secure the vehicle against rolling using a wheel chock, for example, when leaving it. ...