Audio Systems: 2003 Audi A6 XM integration, 2003 audi a6, audi a6

Question
I have a 2003 Audi A6 with a symphony stereo, which has an in-dash 6 disc changer and tape player/fm.  In addition, there seems to be a spot in the driver's side trunk for an additional cd-changer.  I found your response to a question earlier of a similar situation.  I want to add XM, and control it via the factory stereo.  Is this possible?  If so, what parts do i need and where can i get them?  thanks

Answer
yes you can plug a pioneer xm tuner and a blitz xm interface

it will work  you will listen to xm and the radio will control the channels the problem is that the audio radio can not support text from the cd changer port

to find the parts go to oemautosound.com