C70 II: Parking aid lame and hypersensitive

Hey folks! Next week I have an appointment with the friendly in Darmstadt-Weiterstadt. I ordered a set of winter complete wheels and a remote control for the heater. Besides I also told the dealer about the following curiosity: For example, I am standing at the traffic light, next to me a truck or a bus or similar big vehicle. These vehicles give from time to time such a loud hissing from the brake system (?!) of itself. If this happens, and my Cee is in u Other example: an equally large vehicle buzzes past Cee – Cee gets scared, the PDC starts to beep! Seems to be somehow very oversensitive. Meanwhile, I have the rear bumper first scratches – does not fit to oversensitive sensors one could think. In fact, I can’t really rely on the PDC, as they often cause a lot of problems. The dealer told me that the problem was probably well known – at least the hypersensitive sensors were also noticed negatively by a colleague. However, it would be possible to adjust – this would be diagnosed and fixed at my appointment – you can be curious. Does someone have similar or similar problems with the PDC? Already solved?