Replacing Concert with Sony HU
Hi, I'm trying to replace the crap Concert HU in my 2001 (B6) A4 1.8T. I know that the current HU does not have an ignition live, and I plan to take a line of the steering column (is this a good idea of just stupid? any better suggestions) however, at present i cant even get the Sony to power up using the permanent live to test if the other stuff works. the sony unit works as it has been tested today, would it need both permanent and ignition to turn on? this does not make any seance to me and i've spent the day banging my head on this.
any ideas and suggestions would be most appreciated