So there appears to be two diff rubber seals, one each side of window which are intact (abt 18mm wide), these appear ok. I imagine glass sits on top of these with bonding to side of it.
The other is the one that appears to run across the top edge and down both sides (10mm w), this is now in three pieces! It has a slight groove maybe where glass sits in it? So this is the one in question, what does it actually do/do I need to replace it? From my orig pic of car before window came out this rubber isn’t visible!
I’ll inc pics.