Hi all, the radio on my A4 cab has lost reception. It seems I have a common fault (lots of references of web to it) which is a faulty amp trigger wire, probably damaged in joint between car and boot. Audi want £500 to repair. But I think it might be easily solved by replacing the damaged part of the cable and I need to save money! My problem is there are a few black leads running into the amp fixed to the boot lid. I am not sure which is the amp trigger - this is the amp I have The three inputs are marked (1) Radio ANT beige (2) Radio ZF curry (3) modul reichs schwartz. Which is the 12V amp trigger cable? Any advice greatly welcomed.