Hey Scotty, I have a 2021 GLC 300 that consistently has a issue with the front left parking sensor triggering when nothing is around. It could be sunny, cloudy, rainy, snowy. I could have a 5ft gap or 20ft gap on all sides and it will still trigger. It only happens when at speeds below 10mph or standstill.
It's still under warranty so I take it to the dealership. It has been to the dealership multiple times and every time they say they fixed the issue and test drove it after. Most recently they replaced the wiring harness and sensors in that area applied some sound damping tape around the sensors in that area. I myself still experience the issue. As far as you can tell what may be causing the issue?
Can ECU that's going bad cause this issue? can feedback from a usb-c charging port cause this issue?
Those things are so sensitive. Many things can trip it off. Hey it's their car. Let them fix it. I would have told you not to buy the pile of electronic crap in the first place. And half the time the dealers can't fix them And the last time I went to a Mercedes dealer all the mechanics were from Guatemala cuz they work cheaper.
Thanks