you should be able to find the GALA behind the instrument cluster. See my links below. I'm surprised that your original concert HU wasn't running of the GALA. It should be a white wire with a green stripe in the black 8 pin adaptor (behind the Concert HU). This was the case with my 2001 A6....and I was told it is also the case for those with the Concert. Yours might be different. Who knows.
Remember to post pix and details so the others with the a single DIN HU can see what you did. Good luck on the Install!
Remember to post pix and details so the others with the a single DIN HU can see what you did. Good luck on the Install!
