marcoberger1

Mercedes C Klasse water sensor issue

I am experiencing some issues with my Mercedes C Klasse, build year 2017, diesel engine, mileage 105128 km. The check engine light illuminated, and the error memory indicates a water sensor malfunction. The engine is also running rough. Could a defective cable or plug connection be the culprit here, as I suspect? I read the eventual repair cost could be around 95€, is that realistic?

A Mercedes C Klasse owner experienced a check engine light and rough engine performance, with an error indicating a water sensor malfunction. Suspecting a defective cable or plug connection, they sought advice. It was suggested to have a professional diagnosis, which revealed a corroded connector in the water sensor. After replacing the connector, the issues were resolved, and the repair cost was approximately 95€.

Did this summary help you solve your problem?

4 comment(s)

I had a similar issue with my C Klasse. Same sensor fault. Have you performed any sensor testing to rule out a faulty moisture sensor or an electrical fault in the sensor's wiring?

Thanks for the quick reply. I haven't done any sensor testing yet, I am not very experienced with that. Any advice on how to proceed with testing to identify a potential electrical fault?

Confirming the issue, it could very well be a defective cable or plug connection. However, I would advise taking it to a workshop for professional diagnosis. It will probably save you some time and money in the long run.

Thank you for the advice. I followed your recommendation and took the car to a workshop. Indeed, it was the connector of the water sensor. The cable had corroded. They replaced the connector and cleared the error memory. The check engine light is now off, and the engine runs smoothly again. The repair cost was indeed around 95€.

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

MERCEDES

community_crosslink_rmh_model

CKLASSE