Recently had two problems corrected:
1. The engine "Start" button, part of the advanced key option, would not work. I'd press the button, but the engine would not start. Using the key conventionally still worked. The problem came and went intermittently.
The problem was corrected with a software upgrade, according to TSB 2010941/4.
See also AudiWorld Forums: TSB # - 2010941/3 (96 06 03 Oct. 31, 2006, 2010941/3)
2. The MMI system would not hold the Bose surround setting. I'd turn surround on, and later it would be reset itself to normal.
The problem was corrected with a software upgrade, according to TSB 2013108/2.
See also AudiWorld Forums: Re: MMI Excuse?
Current MMI software version:
SW C6-HU 33.6.0 0632