Mercedes SL radar sensor problem

That sounds frustrating! I have a similar SL. I had something similar happen – a complete radar sensor failure. It was like the car suddenly forgot how to 'see'. Was radar calibration required afterwards?

Interesting. Radar calibration - good point. When you say 'complete failure', do you mean it was intermittent, or just totally dead? And how did you finally resolve the sensor malfunction?

Well, 'complete failure' might be a bit dramatic, but it was consistent. The error was always there. I'd suggest taking it to a workshop. It's a complex system, and fiddling with radar sensors without the right equipment can cause more harm than good. I hope this helps.

Appreciate the input! Turns out my initial hunch was correct. It was indeed a dirty sensor. A careful cleaning, and the error vanished. Total cost: 45€. Everything's back to normal. Thanks!