Originally Posted by bill_de
The first thing to do is read the owner's manual. Most CD players have a manual eject, often requiring pushing a pin into a small hole.
I don't KNOW of any players that don't have that small emergency release [but no accounting for Mopar Madness :-) ]
A reasonably stiff paper clip usually works, as does a "T pin" with the point ground flat.
If all else fails, a good local auto stereo shop tends to have folks a bit better than typical mechanic would be at releasing the CD.