Does anyone know if the Concert CD out of a 01 A6 will plug and play in a 96 A4 with the Delta cassette?

Also does anyone know y my CD changer in my A4 would be saying error?

Basically i want to play CDs in my A4 without aftermarket i have grown out of loud and non-stock systems.

 

I have had the same problem you are now having. There, supposedly, is only one CD changer out there that will work (direct link) with the Bose Delta CC radio system. And that just happens to be the Alpine, made exclusively for Audi. Here is a link for more information that I beleive to be reliable: http://www.ibiblio.org/tkan/audi/radios/

Hope this helps. BTW, I just purchased one thru E-Bay. E-Bay seems to have them for sale every few weeks or so. The ones I have watched go for about $150. Beats the dealers $400+ price tag.

Brian