In my VW Polo, I have a Sony XR-3759 head unit. It seems to work fine except when using a cassette adaptor with my my MP3 player. It will play perfectly fine for about 3 seconds, then eject itself. I am led to believe that this is because of the auto-repeat function. Does anybody know of a way to turn this function off, and if it isn't because of this, does anybody have any other ideas?