My 08 Sedan starting doing this since the weather turned cold here in the North East.
The car has 25k miles and it does sound pretty crummy.
While I don't want to disturb the limited slip capability, I also don't see why I should have to live with the noise when it never did it before...
Guess I'll suggest that they do the updated fluid.
Not planning on tracking the car in 2010 anyway.
Will advise with progress on my experience with this.
Dave Flogaus CCA #123862
Instructor, BMW Club Racer & Nürburgring Specialist
95 E34 M5 3.8 Daytona Violet
13 E70 X5d Workhorse
14 F31 M Sport Touring