For anyone removing the plastic side shield on a 1996–2002 4Runner manual seat:
After removing the adjustment wheel and any retaining screws, don't pry the shield straight outward.
The opening around the adjustment-wheel shaft has a notch that allows the shield to disengage from its retaining...
1996–2002 4Runner manual seat height-adjuster knob: The knob is retained by a spring clip behind the wheel. The clip has two small ears that can be hooked with a pick through the opening in the side trim. You may not be able to see the clip clearly until it starts coming out.
