Continental WR40404 Window Regulator - Front Left

Continental Front Left Window Regulator

Restore smooth power window operation with this Continental window regulator, part number WR40404. Built for the front left position, it matches original equipment fit, form, and function for a direct replacement on select Mercedes-Benz models with power windows.

Key Features

• Electric window regulator for the front left door
• Specific fit replacement for select Mercedes-Benz applications
• Metal construction for dependable door-window support
• Motor not included
• OE-style design for straightforward installation and proper alignment
• Built in ISO TS certified facilities

Product Details

Continental WR40404 is a regular-grade electric window regulator engineered for the front left door. It is made from metal and supplied without a motor, making it a direct replacement for vehicles that already use a separate window motor. Continental builds these regulators to match the original part’s fit and function, helping restore normal window travel and reliable operation. This part number WR40404 is a strong match for Mercedes-Benz ML320, ML430, ML55 AMG, ML500, and ML350 models equipped with power windows.

This part cross-references Dorman - OE Solutions 740-404 and ACI 81764 for the same application.

Common Problems It Can Solve

• Window stuck in the open or closed position
• Slow, uneven, or noisy window movement
• Window dropping inside the door
• Broken cable or worn gear regulator failure
• Loss of consistent power window operation

Installation Notes

Verify the front left door position and confirm power window equipment before ordering. Compare the original regulator layout, mounting points, and connector style to the replacement part. Because the motor is not included, reuse the existing motor only if it tests properly and matches the application. For Mercedes-Benz ML320 front left window regulator replacement, Mercedes-Benz ML500 front left window regulator replacement, and Mercedes-Benz ML350 front left window regulator replacement, confirm the vehicle year and door configuration against the fitment list before installation.

Quality Assurance

Continental manufactures this regulator in ISO TS certified facilities and supplies it as an OE-style replacement built for fit, form, and function. Continental WR40404 is intended to restore like-new window performance on the listed Mercedes-Benz applications.