The message on my jammed Audi A8 CD changer is "default"?

I think I may have jammed a CD in one of the slots. How do I repair this. It is making a whirring noise which I worry is damaging the player. I looked to see if I can remove the changer, but don't how. I will gladly take it to be repaired if necessary, but I wonder if there is a way to "spring" this myself.