Parking sensor control module c238

[Rickchutney]

Hi, I have no rear parking sensors working along with no parking pilot assit, any ideas how you would know if the parking senor module located behind the boot lid motor would be u/s . Front sensors all good.
Cheers

 

[AMGeed]

If you take the car to a Mercedes specialist with Star, the Mercedes diagnostics, the fault can be pinpointed