Newer models of Mercedes Benz come equipped with a set of power windows. It is aimed at providing the added convenience of quick and easy window opening and closing at the touch of a button. The automatic Mercedes Benz windows are driven by a small electric window motor tucked inside the car's door. Running on electricity from the car battery, the window motor triggers a mechanism called regulator to activate the gears or spurs that either raise or lower the window glass. Composed of a long arm, one end of which slides in a groove at the bottom of the window to move it up or down, while the other end features a series of gear teeth that mesh with another set of gears, the Mercedes Benz window regulator is actually what powers the window up and down.

The Mercedes Benz window regulator is made of interconnected worm gear, combination of spur gears, a mechanical plate, and a linkage that supports the window glass. Technically, the part that is actually responsible for moving the window up and down is the mechanical plate component of the Mercedes Benz window regulator. At a push on the power window button, the window motor operates the spurs set to activate the mechanical plate. In order that the proper movement of the mechanical plate is controlled, the worm gears combination goes into action when needed.

There are two kinds of window regulator that can be installed on a Mercedes Benz: the manual window regulator and the power window regulator. The most telling difference between the manual and the power system is the addition of a drive motor and electronics for the power system. The same part in the power window system works in a manual type in older Mercedes Benz models, only that the window motor is used to turn the gears in the power window regulator. In manual type of windows, the passenger himself turns the gear with the use of crank handle.

The worm gear set of the Mercedes Benz window regulator are configured to produce a gear reduction, which multiplies the torque output of the window motor, reduces the stress placed on the diminutive electric motor as the window system lifts the weight of the glass. Though relatively small and unnoticeable, the Mercedes Benz window regulator is considered a big performer. As the worm gear spins, the friction between the teeth of the spur gear assembly produces torque in order that the gears bind among themselves to move the window panel up or down.

The Mercedes Benz window lift assembly is fitted with not a few safety features. Designed as safeguard to the windows assembly, the teeth of the Mercedes Benz window regulator become entrenched with one another during operations. It is designed with a self-actuating lock mechanism that latch the mechanical plate of the Mercedes Benz window regulator to the worm gears. With the regulator holding fast the gears, only the power window button or the crank handle can move the Mercedes Benz window regulator and the windows cannot be opened forcibly from outside of the car.