Hi, I've got 2011 B7. Has the phone button on the steering wheel but no bluetooth module in the car. The main dealer said I need a bluetooth module for this button to work, I've asked for the part number to be sure and I'm waiting for the main dealer to get back to me with the part number for over a week. Anyway has anyone successfully put these in to get the phone button working ? If so what cost did it take ? I'd appreciate any info. Thanks.