TDI tyre shreader
I bought a vdo ch600 changer off ebay to chuck in my 172 but i cant get it to work, its spits the mag out etc, and the radio knows its there as it says cd check, but it wont play any disks, it just says no cd. I have tried putting the disks in both ways up and it tells me there is an error on the cds which are the wrong way up, but still wont play the ones that arnt. Is it dead or not compatible with my radio?