My 2013 "beeps" when I lock the door. It's an option in the idrive settings. Maybe I have the alarm.. ?
'08 E90 M3 - Alpine White - Sold
'13 E92 M3 - Silverstone II - Sold
'04 E46 M3 - Jet Black - BBS E88, KW Clubsports, Brembo BBK, SuperSprint Exhaust