Hi all, Bought myself an Alpine Bluetooth / aux stereo (Halfords | Alpine CDE-133BT CD Tuner with Parrot Bluetooth) I was told at the shop I needed a PC9-401 lead (Halfords | Harness Adaptor PC9-401 Audi to speakers) But... after many attempts at trying to get it to work, it simply will not. I originally had the single-din Audi Concert stereo, and upon putting this in it will only stay on permanently and not work off the ignition (or if I try different combinations it will not turn on at all) - extremely frustrated by this. I would be so grateful if any of you guys had any ideas as I've been sat in the car for the past 2 hours trying to do this and wasted £30 on the lead.. Thanks!!!