Specific adapter for upgrading from the old Bluetooth generation to the new Bluetooth generation for Audi A6 4B Simple installation of the hands-free kit thanks to precisely manufactured cables There is no difference to the factory OEM hands-free kit Advantages: High-quality audio output (also at high speed) Fully integrated system Mute sound Control via the radio navigation unit Control via the multifunction steering wheel (if available) Functions: Display of telephone books in the vehicle's FIS Make, accept and end calls Audio gain control Language control via MFL (language module required) Notes: This adapter only works with vehicles with a CAN bus (from model year 2000) You only need the following components for Bluetooth (without bracket): Interfaces 8P1 862 335 A Bluetooth antenna 4E0 035 502 For installation in the center armrest, you need additional components, we will be happy to send them to you on request Use of a bracket You have need additional antenna line from bracket to antenna amplifier (item number 33813)