There have been very few times in the life of any of my 240GLs when all four of the power windows were working perfectly, hence requiring the old pop-the-switch-and scrape-the-contacts routine, a chore that invariably gets left undone for long periods of time, usually when it's gotten to the point that all but one of the windows is dormant and it's
100 degrees in the shade.
It's at those times that I wished that I had manually-cranked windows.
So, I'm wondering how much of a chore it would be to convert them ?