Hopefully someone can help me, I have a standard factory 6CD changer in my cupra and when I press the button on the head unit is just says changer but doesnt actually work. I have checked it is plugged in fully at both ends and still no luck. I didnt know if there was a way to check if the actual changer is knacked before I try and get anotherone. I know you can change it for a mp3 connection but I still want it working.