Originally Posted by Adriansideways
What wheels are you running and what tyres are on them ?
The steering wheel vibration is mainly at highway speed, especially around 75 mph. Doesn't matter what the pavement is.
I've had the vibrations with the 18" OEM wheels and PS2s and Sumitomo after markets, the 19" OEM wheels and PS2s and Continental after markets. I've had multiple alignments and balancings, at the dealer and at Dinan, none of which has done anything meaningful. The dealer techs (BMW of Mountain View and Stevens Creek) have gone on rides with me and acknowledged the vibration but have said that it is "normal" and they can't do anything about it. The instructors at the M performance driving school laughed at the suggestion that steering wheel vibration was normal but I have given up and learned to live with it.
I seem to remember that others with 08s on this forum had the same problem at the same speed but it sounds like either they have gotten the problem resolved through balancing/alignment/new wheels or given up, like me.