Mercedes® Window Regulator, Premium Roller Bearing With Motor, Rear Left, 1984-1993

The window regulator is just another name for the channel and pulley system that guides the window's path up and down. With time, this system weakens from coagulated grease and dirt build up in the teeth and pulleys of this system causing the power window motor to overheat and fail. Occasionally, the added resistance breaks the critical plastic pieces that keep everything moving smoothly.