I just took this head unit out of my astra and removed the included blaupunkt changer to sell on ebay. I advertised it without the changer lead as this is built into the wiring loom on my astra. A guy has bought it and tried to install it in his vectra v6 and reckons that the headunit doesn't even recognise a cd-changer is hooked up and won't let you enter the code!! (the changer seems to be powered as the eject button light is on, although he says it will not eject the cartridge). This is a bit of an arse as it was all working when i removed it from my astra, anyone have any ideas before i ask him to send it back ?