The outer plastic trim is glued to the triangular back window, and then glued to the body. Can be disassembled, of course, but is risky business, for the paintwork and the glass itself, depening of the method you choose. What I mean is there is no rubber seal holding it in place. Actually all of the windows are glued to the body. The B-pillar doesn´t interfere and can be done without molesting the window assembly.