Specific wiring harness for retrofitting a PDC Park Distance Control for Audi A4 8H This harness connects the sensors in the front bumper to the wiring from the control unit Scope of delivery: Cable set Notes: To use all the features of a PDC system, you will need 4 cables: Wiring harness for retrofitting a PDC at the rear Wiring harness for the Park Pilot sensors rear bumper (item number: 40401) Wiring harness for the Park Pilot control unit - vehicle electrical system (item number: 40398) Wiring harness for retrofitting a PDC at the front: Wiring harness for the Park Pilot control unit - front (item number: 40411) Wiring harness for the Park Pilot sensors front bumper (item number: 40465)