Mercedes W639 Front Door Window Electric Lifter Motor Right O/S A6397200546

Mercedes W639 Front Door Window Electric Lifter Motor Right O/S is a factory-original component of the window opening system, designed specifically for the driver or passenger side door. Thanks to its precise construction and fitment for the W639 platform, it ensures stable operation of the window mechanism and proper integration with the vehicle's electrical system. This is the ideal solution for users who expect consistency with the original Mercedes standard and wish to restore full functionality to their window controls.

Specifications and technical data

• SKU: A6397200546-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397200546
• Substitutable numbers: A6397200546, A 639 720 05 46, 0130821940, 0 130 821 940
• Location on the vehicle: Front, Right
• Part type: Regulator & Motor Assembly
• Category: Window Motors & Regulators

Purpose and fitment for Mercedes W639

The presented electric window lifter is designed for installation in the front right door of the Mercedes W639 body. The vehicle placement is factory-defined, which facilitates the identification of the correct component when diagnosing a faulty window and minimizes the risk of errors when selecting parts.

The component belongs to the Window regulators and motors group, meaning it is responsible for both the movement of the window within the guides and the interaction with the control switches in the cabin. The design is ready for integration with the original wiring and controls in the Mercedes, without the need for any system modifications.

Construction and function of the window lifting system

The lifter with the motor forms a complete working assembly responsible for the smooth raising and lowering of the window in the door. The electric drive used ensures:

• controlled window movement across the full range of operation,
• appropriate force transferred to the guide mechanism,
• consistent operation with factory control buttons.

Thanks to a design compliant with the Mercedes standard, the lifter assembly works with the vehicle's factory electrical safety features, which promotes stability and predictable window operation in daily use.

Benefits of using an original Mercedes component

Using an original solution from the Window regulators and motors group in a Mercedes W639 allows you to maintain the factory performance parameters of the window system. Key advantages include:

• geometry matched to the construction of the front right door,
• prepared for installation in existing mounting points,
• compatibility with factory electrical connectors.

As a result, installation is predictable, and after proper fitting, you can restore full window control functionality without interfering with the door structure or the wiring harness.

Characteristics of the used product

The offered window lifter with motor is a secondary market component, which is a cost-effective solution for users looking for a technically sound component at a reasonable price. A used part allows for reduced repair costs while maintaining the vehicle manufacturer's original specifications. In practice, this means the possibility of effectively repairing the window system without having to resort to replacements with uncertain fitment.

Before installation, it is recommended to perform a standard verification of the door's electrical system and the correct operation of the switches so that the newly installed assembly can operate under optimal conditions.

Selection by part numbers and technical support

The window lifter with motor has a dedicated OEM part number and interchangeable numbers, which facilitates precise identification of the component when selecting it for a specific Mercedes W639 equipment version. It is worth comparing the markings with the previously installed part or service documentation to ensure full compatibility with the vehicle.

If you are planning a comprehensive repair or upgrade of the door and window area in your Mercedes and need other components from the same group, such as guides, control motors, or complete lifting mechanisms, check the available parts in the Mercedes Window regulators and motors category.

Additional information on the safe selection of secondary market components and the importance of correct selection by OEM and reference numbers is provided in the guide: Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses practical procedures for identifying parts and optimizing repair costs.