The reason I ask:-

had taken out the original concert tape player and fitted an aftermarket nakamichi unit, but it only lit amber or green.... I wanted red.

got the chance of a concert II cd player from a TT (02) on the underside it says C5/TT so I was sure it would work in my 01 A6 (C5)

fired it in and sure it works but it doesn't illuminate the buttons, not very good at night.

I decided to dig out my old concert unit and it looks like there are a few pin out changes (oops should have looked first)

the illumination pin on my C I doesn't exist on the C II.

Anyone got a pin out diagram for a 2002 TT? or would know what has changed
from the top of my concert 1

iso pinout
1234 [lug]

1 earth
2 illumination
3 s-kont.
4 mute
5 +
6 switched +
7 k-bus
8 GA

from the top of my concert 2
iso pinout

1 earth
2 no description or pin
3 no description or pin
5 +
6 no description BUT has pin
7 k-bus

does that make any sense

Also any idea what the extra aerial on the back FAKRA style thingy

Hope someone can help


2001 A6 Avant