The PIE VWR-AUX converts the 8 PIN connector at headunit of your FACTORY RADIO into an auxiliary input with an RCA connector to provide you digital sound quality. With this converter installed you can connect and listen to any external audio sources such as IPods, IPhones, IPads, XM Satellite Radio, MP3, Video Game Systems, DVD player or any other device that has headphone/RCA audio output without using an FM modulator or transmitter. To aid in the installation of external audio devices we are now a FREE Direct Wire to RCA Cable plugs into the IPod dock and connects with the Auxiliary Input Converter to provide both iPod charging via 12 volt connection from the car and audio output. Designed with built in circiut board that will charge both new 5 volt and older 12 volt iPod models. Works on the 3g iPhone (including the new iPhone S), 4th gen. Nano, 2ng gen. iPod touch, iPod classic and older ipod models. Any other models please email for more up to date fitment.Audi Vehicle Fitment:A3 2006-2007, A4 1998-2006, A8 1998-2005, Allroad 2001-2005, Cabriolet 1998, RS6 2003, S4 2000-2005, S6 2002-2003, S8 2001-2003 and TT 2000-2005. Volkswagen Vehicle Fitment: Beetle 1998-2008, Cabrio 1998-2002, Eurovan 1999-2003, Golf 1998-2002, GTI 1999-2002, Jetta 1998-2001 and Passat 1998-2002.