Mercedes W205 Rear Window Regulator Lifter Panel Right O/S A2057308001

Mercedes W205 Window Regulator Mechanism Rear Right Door is an original part from the Window Regulators and Motors group, designed for the rear right window in the W205 body style. Designed by the vehicle manufacturer, it ensures proper window guidance geometry, stable operation, and compatibility with factory mounting points.

Specifications and technical data

• SKU: A2057308001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2057308001
• Substitutable numbers: A2057308001, A 205 730 80 01, A2057308004, A 205 730 80 04
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and Function of the Mechanism

The window regulator mechanism in the W205 model is responsible for the precise raising and lowering of the window in the rear right door. A correctly selected part guarantees:

• smooth window movement without jamming or play,
• proper guidance in the tracks,
• stable window sealing in the weatherstrips,
• maintenance of acoustic sealing and reduction of cabin noise.

Thanks to its factory design, the mechanism works with the original door hardware, which facilitates installation and reduces the risk of fitting problems.

Construction and Fitment for the Rear Right Side

The presented component is intended for installation in the rear right door area, meaning its geometry, mounting points, and operating range are optimized specifically for this part of the body. In practice, this translates to:

• correct window positioning relative to the door frame,
• no need for bodywork or adaptation modifications,
• maintenance of factory operating parameters for the window lifting system.

Its original Mercedes origin promotes consistency with other door components, such as weatherstrips, guides, or control modules.

Benefits of Using an Original Mechanism

Using an original window regulator mechanism in the W205 allows for the maintenance of the factory standard for the window system's operation. Compared to aftermarket alternatives, such a part ensures:

• better compatibility with the electrical system and comfort controls,
• a lower risk of improper window closing or misalignment,
• easier diagnostics in case of potential faults.

For the user, this means more predictable window operation, no unwanted noises during use, and maintained comfort in daily vehicle operation.

Characteristics of a Used Part

The offered mechanism is from the used parts segment, which helps reduce repair costs while maintaining the original construction. This type of solution is particularly beneficial for wear-and-tear repairs where both technical compliance and service economics are important.

Before installation, a standard check of the regulator's correct operation after installation in the door is recommended, including verifying the window's range of motion, response to door panel controls, and any potential need for adaptation in the comfort system, if provided for by the specific vehicle model.

Part Selection by Numbers and Technical Support

Window regulators in modern models like the W205 can come in several variations depending on the equipment version or model year. Therefore, when selecting, it is recommended to use manufacturer designations and interchangeable numbers to avoid compatibility issues. If in doubt, it is advisable to verify compatibility by OEM number or through the manufacturer's catalog.

If you want to better understand how to safely buy parts from the secondary market and what to look for when selecting by numbers, an expert guide will be helpful: Why it's worth buying used gearboxes and engines – facts instead of myths. The procedures for selection by VIN/OEM and practical tips contained therein can be successfully applied to other components, including window regulators.

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