Originally Posted by dirty_moose
Any chance you remember how you removed the plastic pieces on the top of the seats that the headrests slide into?
There is a small hole in the side of the round plastic trim piece opposite of the adjustment side used to release the headrest from the seat. Using a pin or a stiff wire, I didn't have much luck with it. Ended up carefully prying up under the outside edge of the trim piece to expose the release. Once the headrest is removed, the guides in the seat can be removed.