I too have an 09 with the bluetooth option and the sound quality is pretty poor. Plus I do not have iDrive.
Current: For Sale
:-( - 2009 E90 M3 | SG | FR | 6Speed | Akrapovic Evo | JRZ RS ONE | StopTech Trophy | Cantrell Brake Ducts
On order: 2016 F80 M3 SO | AB XT1 | ZCP | etc.