Dorman 740-576 Window Regulator - Rear Left

Reliable Window Regulator for Select Mercedes-Benz Models

The Dorman 740-576 window regulator is designed for electric window operation in various Mercedes-Benz vehicles. Engineered with a combination of metal and plastic frame materials, this bolt-on regulator offers a durable solution for restoring smooth window functionality.

• Compatible with Mercedes-Benz 300SD, 300SE, 400SE, 400SEL, 500SEL, S320, S350, S420, S500, and S600 models
• Electric window operation type without included motor
• Durable plastic gear material for reliable performance
• Bolt-on attachment type for straightforward installation
• Includes one power regulator; mounting hardware and installation instructions not included

Product Details and Construction

The Dorman 740-576 window regulator features a robust frame constructed from both metal and plastic components, ensuring structural integrity while maintaining lightweight design. The plastic gear material is engineered to provide consistent engagement and smooth window movement. This part is designed for electric window systems but does not include the motor, allowing for replacement of the regulator mechanism itself. The bolt-on attachment type simplifies the installation process by aligning with factory mounting points on compatible Mercedes-Benz models.

Compatible Mercedes-Benz Models

This window regulator is specifically compatible with a range of Mercedes-Benz vehicles, including the 300SD, 300SE, 400SE, 400SEL, 500SEL, S320, S350, S420, S500, and S600. When searching for a replacement window regulator for these models, referencing part number 740-576 ensures proper fit and function.

Common Issues Addressed by This Window Regulator

• Window glass failing to move up or down smoothly
• Intermittent or complete window operation failure
• Grinding or clicking noises during window movement
• Loose or misaligned window glass
• Wear or damage to the regulator gear or frame components

Installation Notes and Tips

Installation of the Dorman 740-576 window regulator requires removal of the door panel and disconnection of the existing regulator. Since mounting hardware and installation instructions are not included, it is recommended to retain original hardware or acquire compatible fasteners. Proper alignment of the regulator within the door frame is critical to ensure smooth window operation. Professional installation is advised if unfamiliar with door panel disassembly or window regulator replacement.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. While this window regulator does not include a motor or mounting hardware, it is built with durable materials to provide reliable service. Please consult Dorman's warranty policy for specific coverage details related to part number 740-576.