Get a flashlight. pull the lever so the changer tips part way out and stops. With the flashlight, carefully inspect the bracket until you locate the screw/bolt that is functioning as a stop. Push the changer back to it's locked position and remove the stop screw. Once again, pull the lever. Now your CD changer will no stop at ~ 30 degrees, but instead will tilt a full 90 degrees to the horizontal postion. Now you should have access to 4 screws that old the changer to the bracket. Remove them and disconnect the electrical plug. You have now delivered a CD changer into your waiting arms.
I did things the hardway before I found the stop screw. I used a small wrench and unbolted the bracket from the wall, then I found the stop screw and so re-installation was a breeze and I learned the easy way to remove the changer.
Good Luck