Cabrio window lifter

When trying to open the window of my cabrio’s driver’s door, the window first went down completely. At the very bottom there was an indefinable noise and the window immediately went up again without a button up to about 75%. After that nothing happens when you press the button. All this on the way to work in the morning. After the drive home I wanted to close the window as far as possible. I noticed that when I press open, I can push the window up with my hand, so close. Shortly after, however, the window completely fell into the door…… The engine of the window lifter is running. I realize that I can completely disassemble the door, repair kit is also ordered and should be delivered today. I looked at the whole process from the vadis. I was concerned, maybe someone has useful hints that make the whole thing a little easier for me. n, any tricks that are not described. It has to be done, that is beyond question…. Thank you already!! Greetings of the Saxon