Rain Sensor: Service and Repair
WM 921219 Removing and installing rain sensor
Removing rain sensor
1. Switch off ignition and remove remote control.
2. Carefully lever apart the cover on the mirror base with a plastic spatula and remove it.
Loosening cover
3. Unclip mirror base from the mirror support.
Unclipping mirror
4. Using a plastic spatula, carefully lever the rain sensor -1- out of the adhesive plate -2-.
Removing rain sensor
5. Unplug electric plug connection -1-.
Removing connector
Installing rain sensor
Information
Limited functionality of the rain sensor if the following points are not observed:
- When assembling the rain sensor, air must not be trapped between the windscreen and the silicone layer on the rain sensor.
- When installing the rain sensor, a temperature of approx. 20°C for the windscreen and the rain sensor must be ensured. If necessary, carefully heat the windscreen with a hot-air gun or similar.
- Contact surface must be free of grease and dirt.
- The sensor on the silicone surface must not be touched by fingers.
- If the sensor is new, remove the protection cap before the sensor is pressed onto the windshield.
- When inserting a new sensor, make sure that no air pockets are caught between the silicone and the windscreen. Air pockets could impair the function of the sensor.
1. Clean inner area of adhesive plate.
2. Insert the electric plug connection -1- until the connector engages securely.
Inserting connector
3. Remove the protection cap from the sensor.
4. Position the sensor -1- and insert it into the adhesive plate -2-.
Fitting sensor
Information
- Ensure that the mirror base has been pushed completely onto the holder.
5. Position the mirror base and connect it by turning until the clips engage securely.
Installing mirror
6. Position the cover on the mirror base and press together until the cover clicks into place.
Fastening cover
7. To check the function of the rain sensor: Use a spray bottle filled with water to moisten the windscreen and switch on the windscreen wiper.