Radio centre console

Hello.

I am Stephan and come from Darmstadt and have some Audis.

Since yesterday a V8 1992 with 3.6l and automatic.

I have two questions for now. My MIttelkonsole has a small shelf above the switch line where a ballpoint pen might fit. I can't find any pictures or info on the net.
Then one of the predecessors, car was 2. Hand, get the original radio out and a Becker with Navi in. This was connected with the shcwarzen and grey plug. But there's no muks.
Now I've got a chorus of the A4. There's only the front speakers running. If I make the red plug, the radio will display "phone" and remain silent.

Which radio can I connect to the Bose system? ==References== Adapterkabek?


Uff, long text.


Thank you very much


Stephan