M Klasse climate control problem

This sounds familiar. I had similar climate control issues on my M Klasse. Have you checked the sensor diagnostics? In my case, the climate regulation was completely off, and the air conditioning refused to engage. A defective cable or plug connection is a common cause. Has there been any prior work done on the system recently?

Sensor diagnostics is on my list for tomorrow. If that doesn't reveal anything, how did you fix your climate issues? Was it a simple sensor replacement?

Yes, the climate control was erratic. After checking the wiring, it turned out to be a faulty sensor. I advise you to check all the wiring and if that doesn't bring any solution, go to a workshop. The sensor replacement resolved the issue, but you need to ensure that's the actual problem. In a workshop, the sensor replacement should be around 95€.

Thanks for the input, climate control is working again. I followed your advice and went to a workshop, the sensor was the culprit, as suspected.