Mercedes-Benz E-Class W210 Rear Right O/S Window Regulator Motor A2108205442

Mercedes-Benz E-Class W210 Rear Right O/S Window Regulator Motor is an original component from the Window regulators and motors group, designed for the precise operation of the rear right window in the W210 body style. It ensures stable operation of the window lifting and lowering mechanism, restoring user comfort and the proper functionality of the electrical system in the door.

Specifications and technical data

• SKU: A2108205442
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2108205442
• Substitutable numbers: A2108205442, A 210 820 54 42
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The window regulator motor is responsible for driving the mechanism that controls the movement of the window in the rear right door. It is a component that works with the vehicle's electrical system and the controls from the driver's panel and/or the switch in the rear passenger door. Thanks to its precise fit for the W210 design, the following are maintained:

• correct geometry of the window lifting mechanism,
• stable window guidance in the tracks,
• consistency with the factory comfort and safety system.

Compatibility and fitment

The presented motor is dedicated for installation in the rear – right side zone, which eliminates problems with improper fit or the need for modifications. Proper adaptation to the W210 door structure allows for:

• maintaining original mounting points,
• proper connection to the electrical harness,
• seamless cooperation with the factory window controls.

As a result, installation is predictable, and the risk of improper window operation after replacement is minimized.

Performance characteristics and advantages

The window regulator motor in the W210 operates in demanding conditions – in doors exposed to moisture, temperature changes, and vibrations. Using the correct component from the Window regulators and motors group allows you to restore:

• efficient opening and closing of the window via buttons,
• acoustic comfort inside the vehicle (proper window sealing),
• functionality of the comfort system, if the vehicle is equipped with one.

This solution is particularly important when symptoms appear such as the window stopping halfway, no reaction to the button, or uneven operation of the mechanism.

Condition of the component and installation aspects

The offered motor is a used part, which in practice means a favorable compromise between repair costs and maintaining the original design intended by the vehicle manufacturer. Choosing such a solution is often preferred by workshops specializing in Mercedes service because it:

• allows maintaining consistency with the factory control system,
• limits the risk of problems typical of low-quality replacements,
• facilitates diagnostics in case of further work on the door electrical installation.

Before installation, it is recommended to perform a standard verification of the electrical installation and the window guide mechanism to ensure the proper operation of the entire system after replacement.

Mercedes window regulators and motors – expansion and door zone service

If you are planning a comprehensive repair or upgrade of the door zone in your Mercedes and need other components from the same group, such as window drives, control modules, or additional guide mechanisms, check the available parts in the Mercedes window regulators and motors category.

Choosing used parts and repair economics

When choosing used window drive components, it is worth considering both technical and economic aspects. A properly selected window regulator motor allows for a significant reduction in repair costs compared to purchasing new components, while maintaining functionality consistent with the vehicle manufacturer's specifications. Issues related to the cost-effectiveness of using components from the secondary market, selection procedures based on manufacturer markings, and cost ratios compared to new parts have been discussed in more detail in the article Why it is worth buying used gearboxes and engines – facts instead of myths.