Originally Posted by viva la Reagan

none of my previous bmw's ever automatically muted the radio on start-up & my current x5 never did either, until recently. i realize your problem is different than mine, that's why i started my reply with the statement that my issue might be unrelated to yours. my point was simply that our issues are similar (not exact), both vehicles are 2007's, & these vehicles have been known to exhibit odd programming quirks, especially when the battery begins to wane. only trying to help.