i made a number of complaints about this. the car when in place and in neutral will vibrate around 2.5-3k. it also does this in gear while moving. the car has been checked and nothing has been found. i have asked to check if the exhaust is touching anywhere and it wasn't. i have also asked to check the cam shaft sensor and the vanos, both came back without faults. the delearship claims it's normal operational behavior. does anyone else have/had this problem. if so, what was the cause?