To dismantle, there are three fasteners at the upper part; unscrew the two screws on the extreme sides and loosen the push pin at the middle and unhook the three clips at the bottom then pull the grille up and off. Next, slide out the top of the grille for the access and then use a screwdriver to release other additional holding clips from below. Finally, installation is as simple as removing as in this process, the tools acts as a complement to the other.