Unlike your headrest, the effectiveness of your seatbelt is what you should be worrying about. Don't mess with it.
Lift up the headrest to the highest position. The metal shafts have plastic rings that are part of the seat. Unscrew the rings counter clockwise around both shafts of the headrest and then pull headrest off.
Use the controls on the side of the seat that you would use to adjust your seating position. The button that you would use to adjust the reclining angle on your seat is also the button that will adjust your headrest. Simply slide the button down and the headrest will lower.
Press into the fabric of the seat, immediately in front of the base of the headrest. This will release the catch, and the headrest can be adjusted up or down, or removed entirely from the seat.
Wear your seat belt, and adjust the headrest to the proper position. Not much else you can do.
Using the seat back tilt lever lower the seat back as far as it will go. Sit in the back seat. Place your arm around the head rest and pull hard. The headrest can only be removed in this position. Works for driver and passenger front seats.
To remove the headrest on a 1994 Plymouth Voyager Van, push the headrest all the way down. Then gently push the headrest back and pull straight up. Some seat models also have a lever on the side of the seat to depress to remove the headrest.
Pull the seat forward as if you were folding the seat down. The headrest will unlock and pull down (same procedure to get the headreast up).
with the power seat switch on the side of the seat (drivers or passengers side). The same switch that reclines the seat back is used 'up' or 'down' for the headrest.
Pull the head rest as far as you can upward. there will be a button on one or both of the plastic pieces covering the holes where the headrest enters the seat. push these buttons in and pull the headrest upwards till it comes completely out of the seat.
There is a black ring right at the seat and you push in on the side of that and it will let the headrest go down.
Anything you do like shimming the seat mount to gain height will decrease its stability in a crash, the best thing, especially since raising it up will practically make the headrest hit the rollbar is to get a cushion for the seat to get you up a little higher.