My steering wheel does the exact same thing - havn't brought it to the dealer yet but I plan to soon. I'll let you know what my dealer says...

I have an '04 4.4 sport with 15K on it right now and I'm not really sure when this started, but I agree, I don't think it was there for at least the first 12k or so. Depending on the response I get from the dealer, I'm going to ask them if I can take a new X5 out with the tech to show him it's not there when new...