Audi iPod iPhone AUX USB Guide A4 2007 2008 « EnfigCarStereo's Blog
Audi A4 2007 & 2008 Radio Removal - YouTube
Audi iPod iPhone AUX USB Guide A4 2007 2008 « EnfigCarStereo's Blog
Bluetooth and iPhone/iPod/AUX Kits for Audi A4 S4 2006-2008 – GTA Car Kits
GTA Car Kits - Audi A4 S4 Symphony 2006 2007 2008 iPod, iPhone, iPad and AUX adaptor installation - YouTube
Installing An Aux Port in 2008 Audi A4 - YouTube
Car Bluetooth AUX Receiver Cable with USB Adapter for VW Audi A4 A5 A6 Q5 Q7 S4 S5 Audio Media Input AMI MDI Interface - AliExpress
No Aux - How can I add one? - AudiWorld Forums
A4 Auxiliary plug? - AudiForums.com
Amazon.com: Yomikoo Aux Adapter, Car Stereo AUX Input & USB Charging Adapter for VW Beetle 1999-2008,Golf/GTI/R32 1998-2002, Jetta 1999-2002, Passat 1999-2001 Skoda Seat : Electronics