Panoramic Sunroof Rattle--Trim
Hello. I have been trying to diagnose a slight rattle coming from my panoramic sunroof. I've checked the headliner and found no loose fasteners and it isn't severe enough to sound like it's coming from the frame. As far as I can tell, it sounds like the plastic trim piece that runs laterally across the inside roof and covers the joint between the two panes is vibrating when I run over a series of small bumps. The dealer tried stuffing some insulating material inside the trim but the vibration hasn't stopped, so I'm doing some sleuthing.
Attached is a picture showing the inside of the trim panel looking from the outside in with the sunroof cracked open in the vent position. The white strip is the insulation the dealer stuffed in there. But I also see a small white disc that looks like it might be residual adhesive, perhaps from some sort of bumper. I was hoping someone with a panoramic sunroof could crack open the vent and look for me to confirm.
If what I'm seeing in the photo is normal, and there is no bumper, has anyone else experienced a similar vibration/rattle from the trim piece? Were you able to fix it? Thanks in advance for your help