Parking Assist Distance Sensor: Service and Repair

Removing and installing sensor for ParkAssistent

Fig. 1:

NOTE: Four sensors for the Park Assistant are installed in the rear spoiler. The rear spoiler must be taken off in order to remove a defective sensor. The sensors are arranged in the order: outer left, inner left, inner right and outer right.

Fig. 2:

The sensor with holder in the rear spoiler consists of six parts.

Fig. 3:

NOTE: The washer (No. 2, Figure 2) and retaining spring (No. 6, Figure 2) have been omitted from the inner left and inner right sensors. The holding spring (Figure 3) with new support facing the rear spoiler is installed for these two parts.


Removal

Fig. 4:

1. Take off rear spoiler. Pull off electrical plug connection. Press together retaining spring at top and pull off.

Fig. 5:

2. Slightly bend apart the holding lugs on the sensor housing and push out the sensor.
3. The washer remains over the sensor housing on the rear spoiler. Remove isolating ring from the sensor.

Installation

Fig. 6:

NOTE: Always fit the isolating ring (Item B, Figure 6) before installing the sensor (Item A, Figure 6). The smooth surface of the isolating ring faces the sensor.

1. Fit isolating ring and push sensor into the sensor housing.
2. Slide retaining spring over the sensor housing and press on until it meets the stop.
3. Engage electrical plug connections and fit rear spoiler.

NOTE: The electrical plug connection in the sensor must always point to the centre of the vehicle. The plug connection with marking (white adhesive tape) on the wiring harness is always connected to outer left sensor.

Park Assistant wiring harness

Fig. 7:

NOTE: The wiring harness is marked at one outer end of the plug connection. Observe the allocation of the plug connections to the sensors.

The outer plug connection with marking (white adhesive tape) on the wiring harness is always connected to outer left sensor.

Park Assistant control module






NOTE: The control module is fastened next to the alarm system/central locking system control module under the driver's seat. When removing, remove the seat and detach the retaining plate (two M6 x 16 hexagon-head bolts).