No, I haven't seen it in the cheat sheet. Trust me if it were I would have done this 18 months ago, lol. I did find a generically worded volume setting in the FDL cheat code. It is set for FF, FF, FF, FF. Which would be annoyingly loud.
Interestingly enough, I wasn't even looking for this when I found it. I was searching through the F30 for something else all together. Their is a thread over there, but it didn't come with a conclusion.
http://f30.bimmerpost.com/forums/sho....php?t=1279640