The noise has diminished slightly, however it is still there and my service writer says that the Pirelli tires tend to get noisier the more they wear down (sounds like a load of crap to me). So when my tires need replacing, which'll probably be in about another 7,000mi. I'll get some Michellens (sp?) and see if they are better. Oh btw, they replaced my complete MMI console and the button that used to say "NET" now says "NAME" go figure.

It's never happened to me, but I've seen enough posts in the wheel/tire forum that I believe it can happen. I faithfully rotate tires every 3k miles; perhaps this helps. I assume this problem occurred with Pirelli PZero Nero's ??