All Non-multifunction Seats
One of the head restraint bars has a locating notch about two thirds of the way down. A spring clip engages in that notch. The spring clip is inside the seat backrest on the head restraint guide sleeve.
When the spring clip is released the head restraint can be fully withdrawn from the seat backrest. In order to release the spring clip and disconnect the pyrotechnic actuator connector, the rear panel of the seat backrest has to be removed.