Dorman 740-458 Window Regulator - Front Left

Reliable Window Regulator for Select Mercedes-Benz Models

The Dorman 740-458 window regulator is designed to restore smooth electric window operation in various Mercedes-Benz vehicles. Engineered with durable materials, this part ensures consistent performance for your 300SD, 300SE, 400SE, 400SEL, 500SEL, S320, S350, S420, S500, and S600 models.

Key Features of the Dorman 740-458 Window Regulator

• Gear material constructed from plastic for reliable movement
• Metal and plastic frame components for balanced strength and flexibility
• Bolt-on attachment type for secure and straightforward installation
• Electric window operation compatible, motor not included
• Includes one power regulator unit without mounting hardware or installation instructions

Detailed Description of the Window Regulator

The Dorman 740-458 window regulator is a replacement part specifically designed for electric window systems in select Mercedes-Benz vehicles. Its plastic gear material reduces noise and wear during operation, while the combination of metal and plastic in the frame provides structural integrity and resistance to corrosion. This regulator is a bolt-on type, allowing for a secure fit without the need for modifications. Note that the motor is not included, so this part is intended for use with existing or separately purchased motors. The package contains one power regulator unit, making it suitable for replacing a faulty or worn-out regulator in your Mercedes-Benz 300SD, 300SE, 400SE, 400SEL, 500SEL, S320, S350, S420, S500, or S600.

Common Issues Addressed by This Window Regulator

• Electric window failing to move up or down smoothly
• Window stuck in one position due to regulator malfunction
• Grinding or unusual noises when operating the window
• Window misalignment or uneven movement
• Complete failure of the window regulator mechanism

Installation Notes and Tips

This window regulator is designed for bolt-on installation, which simplifies the replacement process. However, mounting hardware and installation instructions are not included, so having access to a repair manual or professional guidance is recommended. Ensure the motor is compatible and functioning properly before installation, as this part does not include a motor. Careful alignment during installation will help prevent premature wear and ensure smooth window operation.

Quality Assurance and Warranty Information

Dorman manufactures this window regulator to meet or exceed OEM standards for fit and function. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship. For precise warranty terms, consult the product documentation or contact the manufacturer directly.