First of all, I don't believe you mean quarter panels. The quarter panel is the outer sheet metal skin, the part that you see with paint on it. They are not removable. I assume you want to remove the interior trim. I have had mine loosened up to run some wires but not totally out. They are held in place by a combination of screws and plastic clips. My advice would be to find someone with some experiance to help you out. Everything you see back there is plastic and the clips are plastic and therefore breakable if not done correctly with the proper tools.