I have this on my standard suspension M Sport. My car is at the dealer for this and a few other things.
When I spoke to the service rep on Wednesday aft (I dropped it off on Weds morning) he said that they couldn't find anything and was I sure about the noise. I told him I was, said it was definitely a suspension related noise, which appeared to be coming from the front drivers wheel.
Yesterday when I called I was told my car wasn't ready as they were doing something on the suspension... Fingers crossed. Should get it back today. I will let you all know what happened.
The F30 320ed that they have given me for a few days has the same issue, but not as obvious. That could be due to the fact it has the 16" wheels and I have the 19's and stiffer suspension.
Current: 2013 F30 320D M Sport AW, 403M 19", Bi-Xenon, Black Leather
2005 E91 320D M sport, BSM, Twist 230 19's, Lemon Leather. Death by Swirl Flap
2002 E46 320i M Sport, Convertible, Titanuim Silver, 19's, Xenon, Black Nappa Leather
1998 Lotus Elise 111S, Black