My old car had a slot CD player in the head unit. I've noticed that a few of the discs I used to listen to a lot in there now have several slight scratches on them. Talking to one of my friends he noticed that his have the same too (different make of car). My new car now has a tape head unit, with a 6-CD changer in the boot. Are these multiple changers safe with CDs or should I copy them to CDR for playing in the car. I do make a lot of compilations from my PC which I don't mind if they get scratched. I don't one my originals getting damaged.