If anyone wants to be preventative, You can buy felt pads for the bottom of thiings so they don't mark up your furniture, walmart and hardware stores will have them. Get a a few, cut them to the correct size and stuff them in the slot. Example
https://www.amazon.com/gp/aw/d/B001W...wML&ref=plSrch
Example
Another thing is to get thin weather stripping like go under doors, that would fit too if you get the thin sizes. If you can't find black get a Sharpie, although this would probably be would of sight
https://www.amazon.com/dp/B000052033..._tsxSAb6BZXCXH
Both of these are adhesive and may actually prevent rattles if plastic is touching out of sight. I have been thinking of taking part of the dash apart because I test drove 6 used ones before I bought my new one and they ALL rattled to various degrees in the dash