Hi Guys,I wanted to check if those of you that own a 528i M sports model face the same problem I have.The front passenger seat vibrates at low speed and it gets worse as you drive faster. My guess it has to do with the seat frame.My car is only 2 months old, the guys at AB have not been very helpful. They have taken the car for a few test drives and each time the only remark was " it is a common problem with the 528i m sports model"Would appreciate any advice.