Sensor for parking assistance, rear, removing and installing: Removing

The sensors for parking assistance (arrows) are installed at rear bumper -1- as shown.

Fig 1: Locating Sensors For Parking Assistance (Rear)

Courtesy of AUDI OF AMERICA, INC.

Remove rear bumper.
See REAR BUMPER, INSTALLING .
Disconnect harness connector -1- at sensor.
Press both catches to side (arrow) and press sensor through from outside toward inside.

Fig 2: Pressing Catches To Side (Rear Sensor)

Courtesy of AUDI OF AMERICA, INC.