A quick update. I have now had the chance to speak to the factory, and they quite catagorically stated that it is a case of TADTS (They All Do That Sir), and I can quite see why this should be so.
Because the steering rack has to run across on top of the Bell housing, or, in fact, the cush drive housing, it sits about 2" too high, with the result that the Track rods have to drop down to attach to the steering arms. The result of this is that when the wheel hits a bump and is compressed, the direction that the wheel faces actually changes. This can easily be seen if a person stands on the chassis in front and below the engine and bounces up and down. The front wheels actually move in and out - this is classic Bump Steer, which is more or less what we are getting. The result is normally that the car will dart around from left to right on bumpy roads. When the road is smooth, this will not happen of course.
Sadly, there is no fix for this, although if enough people start complaining they may have to sort it out eventually. I'm surprised at the complacency shown by the factory, it appears they haven't even tried a steering damper yet.
It is looking more and more like I will have to buy or borrow a little GoPro camera to show how badly the wheel shakes, and post it on You Tube, because many people just do not believe this is an issue. [Charlie - I will alert you when I do]
I will also have to try and drive a few other M3W's to compare them.
Still, on the positive side, my dealer commented that my car had the quietest bevel box he had ever heard.
