Have you ever wondered what kind of mechanism makes your car windows go up and down? How about the power windows with the automatic-up feature that raises the windows by themselves, but stops raising them if there is an obstruction? Or maybe you've seen the Volkswagen TV commercial where the guy opens the windows by turning the key in the door lock.

In this edition of HowStuffWorks, you'll learn about what's going on in all of these power-window features and more!