try this basically just carefully insert another CD into the slot, but only about 1 to 2 inches of the disk and keep jiggling the disk around and pressing the eject button. Well what do you know it worked, all 6 CD's popped out, reloaded disks again and all well.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix in-car audio.