There are several causes for rattles in the sunroof- regardless of model. The simple place to start is a check for loose screws. Try this:
Open the sliding roof all the way back
Stand on a stool (etc) so you can reach the roof components from the outside without damaging the car’s paint.
Do not undo anything you don’t have to – why make the job harder?
Try shaking/lifting all the various parts you can see. It will not take much to find the one(s) causing most of the rattling. The most likely is the wind baffle at the front. Chances are one side is tight and the other is loose and juddering. Using a torx driver. tighten any loose screws. The main offender is likely to be the one under a slot at the side of the baffle near the front.
Carefully remove this screw – use a magnet and/or a pair of long nose pliers because it will only come out through the side of the assembly – not through the top slot.
Put one or two small O-rings ONTO the screw AND one UNDER the screw. Carefully align the screw with the hole and tighten it. Now check the baffle again – it should be firmly in place without back and forth movement.
The next likely source of rattle is the sliding cover- more on this later