Mercedes CLA Power Window Problem

I understand your frustration with the power windows on your Mercedes CLA It is possible the window motor has failed but it is also possible the issue lies with the power window switch itself Before disassembling the door panel have you considered inspecting the switch It would be a less invasive first step Think of it like checking the fuse box before replacing the entire electrical panel in your house

Good point about the switch How would I even go about testing that without making things worse I am not sure where to start with the window mechanism or how to get to the switch itself without damaging anything Is there a way to diagnose it properly before I start taking things apart

While some advanced diagnostics are possible with specialized tools your best course of action given the error code and symptoms would be to consult a workshop It is likely a defective power window switch but without proper tools confirmation is difficult They can pinpoint the fault and likely replace the switch for around 200€ Replacing the car window switch can be trickier than it looks

Thanks for the advice I took it to a workshop and you were spot on It was the power window switch 200€ later and all the power windows are working again I appreciate the help