So I've been searching high and low to find more information on the plastic piece on the sunroof assembly guide rails. It has 2 little raised notches and is held down by 2 small screws. You can easily see them when looking into the car while the sunroof is open. My plastic piece broke and I was wondering if i could just swap out that part instead of purchasing a whole new sunroof assembly.. Does anyone know if I can purchase just that small plastic clip? it seems to keep the sunroof in line as mine is recessed (I've done the 30 second reboot and tried adjusting the 4 alignment screws). I think the issue to my roof leak will be fixed by replacing those clips and a new seal. If anyone could help on this topic I would greatly appreciate it. Thanks for the share and I hope someone else can find some info from this tread.