reinharddavis5

S Klasse rain sensor malfunction

I'm having a weird issue with my 2010 Mercedes S Klasse diesel. The rain-light sensor seems to be malfunctioning. I'm getting an error stored in the error memory, and the auto wiping mode in the rain isn't working. Plus, the automatic headlight control is gone, the speedometer dimming isn't functioning, and the lights are always on. I've read that bubbles forming under the gel pad of the windshield can cause this. Has anyone experienced something similar? Is there anything I can check before I take it to a shop? The mileage is at 219684 km.

4 comment(s)

Sounds like a pain! I have an S Klasse too, and I had similar problems with my rain sensor. No auto headlights, wipers going crazy or not at all... Drove me nuts. Did you check the sensor itself for any visible damage or debris? Is the windshield clean around the sensor area?

Thanks for the reply! I did check for debris, and the windshield seems clean. But you mentioned similar problems... Was it definitely the rain sensor in your case? What was the fix?

Yep, pretty sure it was the rain sensor. Honestly, I didn't mess with it too much. I just took it to a workshop. They confirmed it was the sensor and replaced it. Not worth the headache in my opinion! So I would suggest visiting the workshop.

Thanks, I appreciate the info. I took it to a local shop, and you were right. It was the rain sensor, bubbles under the gel pad. They replaced it. Cost me 62€. Everything's working normally again!

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