Solar Sensor: Service and Repair

Sunlight Photo Sensor (G107)

• There are different versions of the sunlight photo sensor. Make sure the allocation is correct. Refer to the Electronic Parts Catalog. If a sunlight photo sensor is installed that is not intended for that vehicle (there is a different signal than the one intended in that Climatronic control module (J255) ), the Climatronic control module cannot evaluate the signal from the sunlight photo sensor and the A/C system is not regulated correctly.

• On vehicles with no A/C (heater only), there is no sunlight photo sensor installed. A cover cap is installed on these vehicles instead.

- Switch off ignition.

- Carefully pry cover - A - out of windshield defroster vent - D -.






• First carefully loosen retainers - F - from defroster vent - D - with a small screwdriver - E -. Do not damage surface of cover - A - or defroster vent - D - when doing so.

- Carefully pry sunlight photo sensor - B - out of front windshield defroster vent - D -.

- Disconnect connector - C -.

• Do not interchange Sunlight Photo Sensor (G107) - B - (4 electrical connections) with light emitting diode for central locking system and interior monitoring system - G - (2 electrical connections).