My friend just bought a 05 X3 and after a month all the windows start to rattle at around 50MPH. She has taken it to Sterling BMW where she purchase the vehicle. They said that it just needed some lubrication. Well, That worked for a day or two. She would retake it back to the dealer but she does not want to be stuck driving a Focus rental if they dont know what the problem is. Does anyone else have this prob? Thanks