Jusr picked up a 2007 550i this week. Couple questions. Sunroof has a lot of wind noise when closed at highway speeds but it doesn't leak when parked or driving in the rain. This seems odd. Also have the passenger seatbelt warning when no one is in the seat... Seems to be a lot of posts about this on this site with no real solutions. Love the car thus far as it was a major upgrade from my Subaru WRX!!