Hi,
I got a 3.0 sport and i have the same problem. The steering just dont feel as nice and taught as i expected. It handles great but pulls like mad in the deep camber ruts. I know that is down to the 19s and the widths but even on a straight road the steering just feels light then heavy and it seems like you have to concentrate to keep it nice and straight all the time. Its not a serious pulling and when i took it to bmw they said its fine. I dont believe it is as many others on other sites have not encountered the same problem. Any ideas?lol