Distronic Plus inoperative W221
just purchased a 2006 s500.
Im having issues with the distronic plus.
The park sensors works fine.
I’ve replaced the aux battery with no luck.
My diagnostic tool says:
6118 Control unit A89 (DTR controller unit) is defective.
Is this indicates the the main radar is broken?
it would awesome if someone could guide me in the right direction.






