You will need
For removal of head restraints installed in the rear seats, it is necessary to drown the two catches of the uprights of the headrests. After which it is removed up. Since all of the above you want to run simultaneously without an assistant in this case can not do.
Headrests installed on the front seats, removed after the seat recline back. Then, himself sitting in the back seat, sharp jerk to itself, remove it from the backrest of the front seats.