Switch off
Press and hold the left button until the control switches off.
Switching on
Press any button except:
Microfilter/activated-charcoal filter In external and recirculated air mode the microfilter/ activated charcoal filter filters dust, pollen, and gaseous pollutants out of the air.
This filter should be replaced during scheduled maintenance, of your vehicle.
BMW X3 Owners Manual > PDC Park Distance Control: Hints
Personal responsibility
Even an active system does not relieve
the driver from personal responsibility while
driving.
Technically the system has its limits, it cannot
independently react to all traffic situations.
Monitor your driving, be on the alert, observe
the vehicle surroundings and ...