The special tool that Y-Blockhead described will work but ya don't need it for the ignition switch. Just reach your hand in behind the dash and push the ignition switch toward the dash. You will see that as you push in, the dash bezel and center keeper now becomes very loose. While maintaining pressure on the back of the switch, use your other hand to unscrew the center keeper. I think it is one quarter turn. Release the back of the switch and let the bezel, crest and keeper fall out in your other hand.
To replace, push in the switch from the back, place your bezel parts on and use your thumb to turn the keeper clockwise at the front and release it. Your done.
