This is the noise mine makes while driving -- seems to happen between 5-25 mph... It also does the standard metallic sound when my car is first started. I will let the dealership know in 4000 miles when my service is due, and ofcourse report back.
Weekend: Ferrari F430 Spider- F1 - Matte White
DD: 2009 BMW 335i M-Sport, SG/Black, 6spd, JB4
Gone: 2008 Aston Martin V8V, Stratus White, Bitter Chocolate, 6psd, Modded ~ 450hp
Gone: 2003.5 E46 M3