Problems with heating, cooling and mirror de-icing in the 2015 Mercedes CLK-Class - Possible defect in the water valve of the cooling circuit

Hey, I had a similar problem with my 2013 Mercedes E-Class. I have a little experience with cars and recognized the problem myself. The garage repaired the cable connection and the plug on the water valve for me and it cost 155 euros. After the repair, everything worked perfectly. Could you give more details about your vehicle? Which model exactly and what have you tried to do so far? It could be something with the cable connection or the water valve connector, as was the case with my car.

(Translated from German)

My Mercedes is a CLK Class from 2015 with currently 80726 km on the clock. There were no particular anomalies at the last inspection. I tried to check the fuses and relays at the beginning, but they were all fine. Thanks for your tip about the cable connection and the plug on the water valve. Maybe it's something similar in my car. 155 euros is not cheap, but if it works again, it would be worth it.

(Translated from German)

Yes, the price of 155 euros is perhaps a little high at first, especially when you consider that you will certainly have peace of mind for a while. In my 2013 E-Class, the repair worked really well and everything worked perfectly afterwards. If you've already checked the fuses and relays, it could really be the cable connection or the water valve connector, as was the case with my car. Of course, it's difficult to diagnose the problem remotely, so my advice would be to actually go to a garage and have the whole thing checked. The professionals there will certainly be able to examine it more closely. It may cost a little, but an accurate diagnosis is worth its weight in gold. It could also be that it is not the water valve at all, but another component that is causing the fault. Please let us know how it turns out! Good luck!

(Translated from German)

Hey, thanks for the detailed answer! Yes, you're probably right, an accurate diagnosis at the garage is probably best. I think I'll make an appointment there and have it checked out. Hopefully it's nothing too serious and can be fixed quickly. It's really great that you've shared your experience with me, that makes me feel a bit better. I'll let you know when I know more. Thanks again and see you then!

(Translated from German)