ok with the mbz parts it does made install a bit harder 'cause they will hold your molding. the lower moldings have a nut on one end or both ends. align these first the belt molding also has nuts one one side near the boot/trunk. the rocker moldings i install by placing the molding on the upper ends of the clips and then use my hand the 'slap them' at a downward angle. your hands will be sore but it works and then the nut/or nuts and they will not come off unless you desire them too. hope this helps.