it should be a common VW problem over years that after a while the backrest of the front seats starts to wobble. Only the backrest is wobbling, the ground where your ass is does not whobble. As I informed myself, it does not matter, if it is a 3-door verion or a 5-door version. So it does not matter if the backrest is fouldable or not.
The problem is that between some rivets and the metal blades is a plastic part. To fix that you should drill out the rivets, manufacture some sleeve to replace this ugly plastic part, and mount it with M8 screws.
I think you can gues that the backrest of my Polo 6R seat is wobbling.
My question to you: Did someone have the same problem and fixed it? Are the red marked rivets in the picture the rivets I have to drill out?
![Image](https://i.ibb.co/qn51wpb/1000376182068-20200302151942.jpg)