You need to carefully look at the place where the aluminium hinges are glued. All failures happened to me there, and I had no troubles with the 'hook' that go into the latches. It seems that extreme heat is transmitted trought the glass to the aluminium plate which can get 'twisted' by the heat and will create an abnormal pressure
Looking from the outside, should you see any sort of 'bubble', then the glue is on its way to break and your windows will get loose.
In some cases, you can see the glass delaminating
For as long as you don t open the window, they are stuck in place by the hinges hooks, even if the glue is gone on the main plate. The solution then is to have several strong rislan and link the two hinges from inside the car. It will pull the springed hinges back to place and the window will go flat as the pressure on the spring loaded hinges is blocked by the rislan
however, the window will no longer be flush or watertight
When the glue from the hinge is gone DO NOT open the window: the latches will open and the springed hinges will push your window away. They will damage the bodywork when falling
I drove once from Nice to Milan with one of the windows off, and lost another in Rome on my way back to Paris. Really annoying but even at very high speeds (In excess of 150 MPH on Italian motorways) it wasn t much more noisy that normal
But it was summer time........
When you re-glue, do ensure the aluminium plate is perfectly flat. A bit of machining was necessary on one of them. I also got the edges slightly grinded to avoid sharp angles that could break the glass. I also got the screw holes machined in a bigger diameter but that was done so that the new hole was marginally higher than the original ones. It helps to ensure the windows are perfectly watertight. On some cars, there was water ingress which was only resolved by the factory in putting a few spacers between the roof and the electric latches. It is a poor engineering solution and redrilling the aluminium brackets and the hinges is much more elegant as you don t need the spacers that are slightly visible
