I have had this issue before. The dealer said the window defrost air duct was loose. They said the only way to replace the air duct was to replace the door panel so they replaced the entire door panel.
Does the window in the 3rd picture go down any further? On one of my doors, the window stops at that position, but the other window goes down further, such that you cannot see even a sliver of glass when the window is fully down. I was wondering if it was normal to see some of the glass when the...
Did this fix work for you long term? My dealer attempted this fix on my driver door last January. They said they put cloth tape between that plastic piece and the metal door frame. The rattle was gone for a few months, but it started rattling again later.