Older model vehicles had manual windows that were rolled up and down with a handle.  Usually, the only thing that went wrong with these windows, aside from breaking or cracking, was coming off track.  These days, most vehicles are equipped with power everything, including windows.  Although power windows are much easier to operate than the old time handles, they also have a down side.  Your Audi window motor can burn out while your windows are up or down.  That means you could get trapped without being able to roll down the windows, which is a huge problem if you're a smoker.  If your window motor burns out while the window is down, your interior can be saturated by rain, snow, or other types of weather damage.  You're also set up for theft and vandalism when your windows are stuck in the down position.  It's  so easy to replace window motors, you can do it all by yourself.