Mercedes A Klasse solar sensor issue

I have an A Klasse. I had a weird HVAC issue that turned out to be a dodgy temperature sensor. Could that solar sensor be feeding incorrect data to the climate control system? Have you checked the basics, like fuses and making sure the sensor isn't blocked?

You propose that a compromised temperature sensor may be the cause? When you say 'check the basics' does it mean anything beyond a visual inspection?

Yes, the solar sensor, or any HVAC sensor, could be throwing things off. A visual inspection is a start. Fuses are easy to check with a multimeter if you have one. With a stored error code, and given it's affecting your heating, it might be worth having a workshop run a proper fault detection. Could save you guesswork and potential issues.

Thanks for the insights. The fault was in the solar sensor's wiring. A replacement was installed, resolving the issue. The vehicle now operates normally.