We recommed that you dont poke around inside the mechanism,
If Any Damage Is Caused You Repair Will Become More Expensive !
CAR AUDIO REPAIR SERVICE
But Not FREE
Premier Audio UK, October 2008
Either try and tease them out with another (old) CD or remove the player from the dashboard using a pair of extractors and dismantle the player to release the CDs.
You will more than likely require a code for the radio/player.