IF you STILL haven't had the dealer install the cap cover yet, the following will help. Examine the back of the cap cover, and you will see TWO protruding hook-like plastic tabs towards the top, and one plastic tab towards the bottom. Place the cap cover STARTING from the top, making sure that the two hook - like plastic tabs HOOK onto the corresponding sites on the keyhole area. Note that there is perhaps a 2 to 3 millimeter gap between the cap cover edge and the door handle (ie, if you align the cap cover too close to the door handle, it will NOT snap into place). Once you have the top part of the cap cover "hooked on" (again with a 2 to 3 mm. gap from the door handle), press down the bottom part of the cap cover, and its bottom tab will snap into place :)