Just got it back. Finally quiet like my Lexus was. I blame BMW NA's policies more than the dealerships for this kind of difficulty, as they give them a hard time about reimbursing for work done to get rid of unexpected noises. Requested that one of BMW NA's reps call me tomorrow and am going to remind them that if they charge 100k for a car, paying the dealer to deal with minor annoyances is just going to come with the territory of pricing a car into the ultra luxury class. Not that it will make any difference to them, but at least it will be on record.
2015 Ford Expedition Limited
2014 M6 Convertible Individual Citrin Black
2013 750i Mineral White
2011 750i Jet Black
2007 750i Monaco Blue