I had a rattle in my dash area also over rough roads or hot sunny days. Tightening the 2 screws above the instrument cluster trim about 1/2 turn each seemed to make mine go away.
Just did this mod and can't thank Tadda enough. Base is tighter and can actually crank up the volume now. Even my wife was able to tell the difference right away.
I remember I did this years ago in my old GTI as well by cutting a slit into a nylon washer and sliding it in btwn the belt and bolt. Does anyone know the anchor bolt size by chance?
Some Bimmercode options are only available with OBDLink MX+.
See the link below, examples are in the PDC, rear view camera, seatbelt reminder sections, etc.
https://bimmercode.app/cars/a90/