Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
61 35 688 Replacing solar rain/light sensor and fogging sensor
Necessary preliminary tasks:
- If necessary, remove INTERIOR REARVIEW MIRROR. .
For equipment specifications:
- without 2-zone automatic air conditioning (optional equipment 534)
- without 4-zone automatic air conditioning (optional equipment 4 NB)
- with Head-Up Display (optional equipment 610)
Disconnect plug connection (2).
Unlock metal spring (3) in direction of arrow.
Remove solar rain/light and condensation sensor (1) from windscreen.
Installation:
Close plug connection (2) only after fitting solar rain/light and condensation sensor on windscreen!
Carefully clean windscreen in the contact area with the solar rain/light and condensation sensor! Remove all silicone residues.
Remove protective cover from the new solar rain/light and condensation sensor. The silicone-coated surface below it must not be touched!
Press metal spring (3) centrally to ensure that there is correct engagement in both hooks (5) on every side of the retaining element (4).
Replacement:
Carry out coding to determine the windscreen type for the light sensor.
Carry out INITIALIZATION to calibrate the rain sensor to the windscreen.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.