C6 A6 Audi Parking System Not Working / Frozen Help

[audi_s5]

2006 A6 SLINE w/ MMI/NAV/AUDI PARKING SYSTEM

No beep / noise when reverse engauged. When in MMI under car menu/systems/ ** can not move frequency or volume. Just stays where it was previously set.

Any advise.

I am assuming bad rear sensor and / or module??

Thanks for the help.

[zzz4]

Try resetting the MMI. I am assuming you have cleaned up the sensors on the rear bumper (basically, the bumper is clean).

[audi_s5]

Try resetting the MMI. I am assuming you have cleaned up the sensors on the rear bumper (basically, the bumper is clean).

Tried reset, no luck. Car is always detailed to a T.

Tried forum search, google. Any other ideas?