I currently own a 2011 BMW 328i (Hardtop Convertible), the car has been to the dealership many times for them to scan it and they are still un able to find the issue. When I use the "retract all" button for the windows, on occasion the window will go up halfway and then go back down. I have had the motor replaced for the front passenger window and I continue to have this issue. I was also told by a neighbor who works in the automotive industry that BMW made a secret re call on the roofs of the 328i from year 09-12. If Anyone out there is having/had this same issue your help would be greatly appreciated!