Features: 1.Fitment: The Bluetooth module is specially built, replacement for A8 TT R8 A3 A4 RNS?E Navigation, replacement for Gallardo, replacement for TT 2001?2002. 2.Operating Guide: Match your mobile phone or tablet with the Bluetooth module, and select Aux from the radio, then you can use your phone to play music through the car speakers. You can listen to music from mobile phone, mp3 (they should have Bluetooth function). 3.Easy to Operate: Just plug the 32?pin connector into the socket on the back of the radio, and no password is required for connection. 4.Support Bluetooth Version: Support Bluetooth device operation, Bluetooth 5.0 version, there is no functional limitation of car radio, allowing you to connect external audio sources. 5.High Reliability: The manufacturing conforms to the standard specification, can realize a perfect match with your car audio system. Specification: Item Type: Bluetooth AUX IN Adapter_x000D_ Material: ABS_x000D_ Fitment:_x000D_ Replacement for A8 TT R8 A3 A4 RNS-E Navigation_x000D_ Replacement for RNS-E navigation (navigation plus)_x000D_ Replacement for A3 2004-2005_x000D_ Replacement for A4 2004-2005_x000D_ Replacement for A6 2004-2005_x000D_ Replacement for A8 2001-2002_x000D_ Replacement for TT 2001-2002_x000D_ Replacement for R8 2001-2002_x000D_ Replacement for Gallardo_x000D_ Replacement for RNS-E audio aux VCDS coding_x000D_ 1. Connect with module 37-Navigation._x000D_ 2. Choose procedure 07-Coding._x000D_ 3. Read original coding (e.g. 0205115). Write down this number._x000D_ 4. Change second to last digit by adding +4 to current value. E.g. 0205155._x000D_ 5. Enter and save new coding._x000D_ 6. Exit._x000D_ From now on when you go to CD/TV--Source (or MEDIA - Source) you will see AUX option. Choose it and your replacement for RNS-E will start playing audio directly from your addition audio source.