the clips are plastic and usually break when trim removed. no need to try to save a 30 cent clip, as the old clip is already bent from use and won't have the holding spring force of a new clip.

also the fat piece of trim at the rear window pulls straight out at you (perpendicular to the body). the two clips are different and probably can be reused. the rest of the other clips, you lift the bottom edge of the trim, then rotate/twist towards the sunroof. then listen for the snap of the clip breaking...

Buy the clips form BMA; as dealer will charge 3-5 times MORE.