https://www.hella.com/techworld/en/technical/car-electronics-and-electrics/ultrasound-based-parking-aid-park-distance-control-pdc/
Park Distance Control (PDC): a parking aid based on ultrasound | HELLA
What does Park Distance Control mean? You can find useful information and tips on the installation, maintenance and repair of the ultrasound-based parking aid...
park distance controlparking aidpdc