Frame Mercedes W205 Front Window Right O/S Guide Rail Sealing Gasket A2057256600

The Mercedes W205 Front Right Window Frame Seal Rail is a precise body component responsible for the stable guidance and tight fit of the front right window. The original design, dedicated to Mercedes W205 models, ensures proper alignment with the body and correct cooperation with the window lifting mechanism. This solution is for users who expect factory geometry, proper sealing, and reduced cabin noise.

Specifications and technical data

• SKU: A2057256600
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2057250225
• Substitutable numbers: A2057256600, A 205 725 66 00, A2057250225, A 205 725 02 25
• Location on the vehicle: Front, Right
• Category: Window Seals, Gaskets & Trims

Component Purpose and Function

The presented frame with seal and rail is intended for installation in the front right window area of the Mercedes W205 body. It is responsible for:

• guiding the window along the correct track during opening and closing,
• maintaining the stable position of the window relative to the door frame,
• sealing the window perimeter at its junction with the body,
• limiting air drafts and water ingress into the interior.

By maintaining proper rigidity and shape, the frame integrated with the seal supports acoustic comfort and correct door closing, which is important for both daily operation and the durability of other door components.

Construction and Fit for Mercedes W205

The construction of the frame with seal has been developed specifically for the W205 body geometry, which translates to:

• compatibility with the front passenger side door line,
• proper adhesion of the seal to the window and body,
• stable mounting of the guide rail in factory mounting points.

Such a fit minimizes the risk of stress on the glass and improper operation of the lifting mechanism, and also facilitates service installation. A correctly selected frame with seal helps maintain the body line consistency and the aesthetics of the vehicle's side.

Performance Characteristics and Benefits of Use

Using the dedicated front right window seal frame in the Mercedes W205 allows for the restoration of correct operating conditions for the entire door assembly. In practice, this means:

• reduced cabin noise at higher speeds,
• better protection against moisture and dirt,
• smoother window movement in the guide,
• reduced risk of window edge scratches.

This is particularly important after collisions, body repairs, or window replacements, when it is necessary to restore the original operating conditions of moving parts. Choosing an original frame with seal supports the stability of the entire door system and facilitates subsequent adjustments.

Part Condition and Service Aspects

The offered component comes from the Window Seals and Trim group and is a used part, which is a cost-effective solution while maintaining the original manufacturer's specifications. For workshops and individual users, this means the possibility of performing repairs using a component with factory shape and mounting points, without the need for body modifications.

Before installation, standard inspection of the contact surfaces, mounting points, and cooperation with the window lifting mechanism is recommended to ensure even pressing of the seal and correct door closing. A properly installed frame with seal allows for maintaining the functionality and sealing of the door area at a level consistent with Mercedes' design intentions.

Related Components and Service Knowledge

If you are planning a comprehensive repair or upgrade of the side glazing area in your Mercedes and need other components from the same group, such as additional seals, trim strips, or window guides, check the available parts in the Mercedes Window Seals and Trim category.

When selecting body components, it is also worth consciously deciding whether restoring an existing part or using a used original will be a better solution. Helpful information on this topic can be found in the article Refurbished or Used Original – Which Part to Choose for Repairs?, which discusses the practical differences between these approaches in the context of real repairs.