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Changes to How to fix Mercedes W123 "screw open" style window regulator Introduction

Edit by Nicolas Siemsen

Edit approved by Nicolas Siemsen

The power window regulators in the W123 cars are powered by a motor with a gear that moves corresponding gears on the regulator. These motors are very robust and when a window is not moving up and down properly it's often the regulator, not the motor, that is the problem. However, they are not everlasting or invincible! [ … ] Age, combined with a certain amount of abuse when using the motor on a regulator that is rubbing, jamming, or skipping can lead to the need for some repair/maintenance. In this guide, you'll learn to open up one of the two styles of motors; in this case, the motors that open up easily with the removal of a few screws. Once open, the electrical motor can be cleaned and the gears can be re-greased and you can likely get several more decades of use out of your motors!
Time Required Min
10 minutes
Time Required Max
10 minutes