XCarLink A4 B8 with Concert Radio

jamin128

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Has anyone fitted an XCarLink to an A4 B8 with a concert radio?

I have a couple of questions that I can't seem to find the answer to:

1. What is the acc wire for? I have plugged the interace into the radio and it powers up ok.

2. How do I get the mode button to work? I read somewhere about can low and high on the air con wiring!!!

Thanks in advance :)