Dorman 740-066 Window Regulator - Front Left

Reliable Electric Window Regulator for Mercedes-Benz Models

The Dorman 740-066 window regulator is designed to restore smooth electric window operation in select Mercedes-Benz vehicles. Engineered with durable plastic gears and housing, this power window regulator offers a bolt-on attachment for straightforward replacement.

• Compatible with Mercedes-Benz S55 AMG, S65 AMG, S350, S430, S500, and S600 models
• Electric window operation type without included motor
• Durable plastic gear and housing materials for reliable function
• Metal and plastic frame construction for structural support
• Bolt-on attachment type for direct fit installation
• Includes one power regulator unit; mounting hardware and installation instructions not included

Product Details and Construction

The Dorman 740-066 window regulator features a plastic gear mechanism paired with a plastic housing to ensure consistent window movement. The frame combines metal and plastic components to provide necessary strength while maintaining a lightweight design. This part is intended for electric window systems and does not include a motor, making it suitable for vehicles where the motor remains functional or is replaced separately. The bolt-on attachment type allows for a secure fitment without modification, specifically engineered for Mercedes-Benz S-Class models including the S55 AMG, S65 AMG, S350, S430, S500, and S600.

Common Applications and Problem Resolution

• Restores smooth electric window operation in Mercedes-Benz S-Class vehicles
• Replaces faulty or worn window regulators causing window misalignment or jamming
• Addresses issues with window movement due to broken plastic gears or housing
• Suitable for repairs where the motor remains functional and only the regulator requires replacement
• Eliminates rattling or loose window glass caused by damaged regulator frames

Installation Notes and Tips

Installation requires removal of the door panel and detachment of the existing window regulator. Since mounting hardware and installation instructions are not included, it is recommended to retain original hardware or source compatible bolts. Care should be taken to align the regulator properly within the door frame to ensure smooth window operation. Professional installation is advised if unfamiliar with electric window systems.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit and function. The 740-066 window regulator undergoes quality checks to ensure durability and reliable performance in Mercedes-Benz vehicles. Warranty coverage details should be confirmed at the point of purchase.