jonison

Hi, all, my car is 2023 e450 coupe, brand new purchased from dealer. I noticed this noise issue after couple of months from the sunroof of pano window

1. The noise sounds like plastic hits the metal.
2. It comes from the edge of sunshade ONLY when it is fully closed and running on really rough road. If the shade is open a little bit, the noise is gone completely.

The car is in dealer ship for over a week and they cannot determined the reason (I provided a video for them to analysis)

I have uploaded a mp3 file which recorded the noise, and wish the expert can advice on this aspect.

Thanks