Rear parktronic 2000 s class not working
 

I have a 2000 s-class and the front parktronic works fine however the rear does not. As it says in the manual when it does not work you get the red segemnts and a tone. I found one of the rear sensors pushed in the hole and it had a large scratch across the lense. As a test I took a piece of masking tape and taped over a front sensor to see if it would give me the same red segements as the rear. When I put it in drive I did not get the malfunction indicator of the red segment and tone for hte front. Could the sensor I found pushed in and scratched cause the rear to be inop

Thanks for any help

One or more sensors most likely has an internal fault. PTS sensors do not
take kindly to being hit or scraped. Your MB dealer can run a SDS short test
for codes. The offending sensor will be identified by the computer.
They can test all the others for accuracy as well.
Regards,
Dr.D