Hey folks... Having a bit of trouble with fitting my headunit. I have wired up the pos and neg to the battery but it still wasnt working...so i joined the ignition switch wire (off the headunit loom) to the permenant feed from the battery and it worked!!!! My question is.....in the audi wiring where the f*(k is the ignition on wire??? I tried every wire in the picture but none of them worked!!! Urgent advice needed!!!! BTW....when i have completed my system i will post pics. (fitting the alpine IVA D300R dvd screen with amp and 2x 12" subs in the boot!!!!) cant wait till its done!!!