I'm new to the forum...Picked my 550xi M Sport up from the dealership this past Saturday morning - it's absolutely beautiful and I hope to put up some pics soon.
Anyway, The CA was in the car with me for a little maiden voyage spin (at her recommendation), and wouldn't you know it, as we pulled away sharply from the curb - the grinding sound you've all been describing coupled with a small vibration occured.
It happend once again on that initial drive, though honestly, I have not heard it or any abnormal sound or feeling since. Luckily for me (us) the CA was in the car with me and clearly heard the noise and felt the vibrations as well. She notified both BMW and the Service department at the dealership. She also called me this morning to check in, but as I mentioned, nothing to report.
Will keep you all posted.
2011 550ix, Dark Graphite/Black Nappa, M Sport, PP2
2007 X5 4.8, Black/Tan, Sports Pkge
Retired 2008 535xi
Retired 2004 X5 3.0
Retired 1998 328i