A5 Bang & Olufsen Stereo Problem

[Pursyluv]

Just popped and banged over from the Cerbera forum to ask the following question.
A colleague of mine recently collected his A5 2.7TDI and has the upgraded B & O stereo fitted, which has on a couple of ocassions turned itself off. Before he lets the dealer look at it, he has asked me if any PH members have experienced a similar problem. Any advise would be welcome.

Thanks
Bob