Thrash

Hi all
I recently had the window seals replaced on my C205, since then I have noticed quite consistent rattling noises coming from inside the door/around the window area. I have read about this issue on W205s but most of the solutions seems to be related to the top of the window/door but the windows in the C205 are frameless so I can't see how to apply the same fix.
I've noticed when it's raining the issue doesn't seem to be as pronounced, so I'm wondering if it is just a case of applying some lubricant somewhere, but I don't really know where and I don't want to start taking things apart.

Anyone have any ideas?

Thanks in advance