With the auto switches installed from the factory, you get 'pinch protection', i.e. if you have something hanging out the window and you close the window using the auto up, the window will automatically reverse if there is something in the way.
Does the window automatically reverse if you don't have the auto switches? If not, then it is even more than just replacing the switches to get the same function (federal law requires the auto reverse feature for safety).
Gary...