DIY is the way forward (or DID - Do It at Dealer). I did something similar on my old E46 325ci when this happened and it never came back. Poor show from BMW IMHO, just hope mine are ok.
Current: E90 335d (May 2007) | Black/Black | Prof Hifi | Prof Nav | 6FL | Fully Electric Seats | Xenons | Folding Mirrors | PDC
Previous: 325ci Conv. Black/Black with lots of ACS
Previous: z3 3.0 Silver with Black&Red Leather