Mercedes EQC Fog Sensor Issue

I encountered a strikingly similar predicament with my EQC The symptoms you describe suggest a shared underlying malfunction The inoperative air conditioning and mirror heating coupled with the frozen spray nozzles indicate a failure within the windshield fogging detection system I would suggest you look at the sensor itself

When you say 'the sensor itself' are you referring to the main fog sensor module or a specific sub-component Did you manage to isolate the precise point of failure or did you end up replacing the whole thing I'm trying to avoid unnecessarily replacing parts Also I am curious if you had an electrical issue with it

Given the complexity of the integrated systems within the EQC and the potential for cascading failures stemming from a faulty automotive sensor I would advise against attempting a self-diagnosis or repair beyond a preliminary inspection of accessible connections In my instance the resolution necessitated a visit to an authorized Mercedes-Benz service center for a comprehensive diagnostic assessment and subsequent component replacement I recommend you do the same and go to the workshop

Thanks for the insight I appreciate you confirming my suspicions about the fog sensor being the root cause I'll schedule an appointment with the service center Turns out you were spot on It was indeed a faulty connector on the humidity sensor harness They cleaned the contacts re-seated the connector and cleared the codes Everything's back to normal The 95€ was the diagnostic fee thankfully no parts needed