Let us know what you find out from the dealership. I had a similar noise (wasn't as loud). We put it up on the lift at BMW as it seemed to be coming from inside the exhaust (was not anything mechanical squeaking/rubbing). We kinda blew it off as nothing too important but it wasn't as loud as yours but similar. I am not sure if it's still there as I have not noticed it lately. Keep us posted though. Thanks!
Brian
|