This Dorman window regulator, part number 740-404, is the mechanism that raises and lowers the front left door glass. It is a power window regulator sold as the regulator only, without a motor. It fits several Mercedes-Benz ML models, among them the 2003-2005 Mercedes-Benz ML350, 2002-2005 Mercedes-Benz ML500 and 1998-2003 Mercedes-Benz ML320. See the "Vehicles it fits" section for the full list and engine details.
As a Dorman OE Solutions window regulator, it is precision-engineered and extensively tested to replicate the fit, function and performance of the stock regulator on the listed applications.
- Trustworthy replacement: engineered and tested against the original window regulator's fit, function and performance on specified vehicles.
- Quality assured: cycled thousands of times in an actual vehicle door. This testing is intended to support a long, trouble-free service life.
- Reliable design: engineered in the USA and backed by Dorman's long history in the automotive aftermarket.
- Easy installation: reverse-engineered to the original equipment shape and dimensions for a direct, seamless fit.
Signs the regulator may need replacing include glass that moves slowly, stalls, tilts or drops into the door, and grinding or clicking from inside the door when the switch is pressed. A motor, switch or wiring fault can cause similar symptoms, so diagnose the cause before replacing. This unit is for the front left door, and the motor is not included.
Interchange: 20-1113 · 21-1113
201113 · 211113 · 11A135 · 11R147 · 81764 · 88008 · 823410A · WLR1166 · M462940 · REPM462944 · 1637200146 · 1637200346 · 1637201146 · SK740404 · WR40404 · 660186 · WPR4734L
This part cross-references / interchanges with the following part numbers:
11A135, 11R147, 81764, 88008, 823410A, WLR1166, M462940, REPM462944, 1637200146, 1637200346, 1637201146, SK740404, WR40404, 660186, 20-1113, 21-1113, WPR4734L
Frequently Asked Questions
What does the Dorman 740-404 window regulator do?
It is the mechanism inside the front left door that raises and lowers the glass on a power window. It is supplied as the regulator only, without a motor.
Is this the right Mercedes ML320 window regulator for my 1998-2003 Mercedes-Benz ML320?
Yes. Part 740-404 is listed for the front left door of the 1998-2003 Mercedes-Benz ML320. The "Vehicles it fits" section shows every listed application.
Can I use it as a 2003-2005 Mercedes-Benz ML350 window regulator?
Yes. It is listed for the front left door of the 2003-2005 Mercedes-Benz ML350 and the 2002-2005 Mercedes-Benz ML500. See the "Vehicles it fits" section for the other listed models.
Is the window motor included in the box?
No. This power window regulator is sold as the regulator only, so no motor is included. Follow the vehicle service information when installing the motor and regulator.
What are signs a window regulator may need replacing?
Signs include glass that moves slowly, stalls, tilts or drops into the door, and grinding or clicking when the switch is pressed. A motor, switch or wiring fault can cause the same signs, so diagnose first.
