Retrofitting bluetooth is a big job. Stealer cocked up my last order and forgot to add BT.
They eventually agreed to retrofit it for free (after initially saying it was not possible) but they needed the car for 2 days I think to do it.
I believe the quote for getting it done was £1800, and a large chunk of that was labour.
E93 M3 | Azurite Black | Extended Bamboo Leather | Piano Black Trim | 19" 220M Wheels | Shadowline Trim | Edition Grills
M DCT | HDD iDrive | EDC | Bluetooth | Front & Rear PDC | Heated Seats | DAB Radio | Hi-Fi Speakers | USB Audio | SmartTOP