I had the problem (and don't have CD changer). Dealer replaced the MULF2 control module and updated car with Progman v26.02.01. So far, problem has not recurred and have fingers crossed.

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2012 328i Luxury, Jet Black/Saddle Brown (ED 8/9/12)
2012 X5 35i Sport Black Sapphire/Black/Dark Bamboo, Active Vent Seats, Premium Sound, Convenience, Soft Close Doors, Running Boards, BMW Apps
2009 335i Jet Black/Oyster
2007 X5 3.0 Black Sapphire/Beige (Sold)
2007 335iC Alpine White/Red (ED 11/15/06) (Sold)
2004 545ia Jet Black/Black (Retired)
2001 525ia Jet Black/Sand (Retired)
1995 540ia Jet Black/Black (Retired)
1992 325ia Jet Black/Gray (Retired)