Mercedes W205 Window Rail Seal Rear Right O/S Sealing Strip Trim A2057300424

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes W205 Window Rail Seal Rear Right O/S Sealing Strip Trim is a precisely fitted body component from the Doors and door panels group, designed for the rear right door. It is responsible for effectively draining water from the window and stabilizing its movement, which ensures smooth operation of the window regulator mechanism and protects the interior from moisture.

Specifications and technical data

• SKU: A2057300424
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2057300424
• Substitutable numbers: A2057300424, A 205 730 04 24
• Location on the vehicle: Rear, Right
• Color: Black
• Category: Doors & Door Skins

Purpose and function of the window rail seal

The described window rail seal has been designed specifically for the rear right door of W205 series models, ensuring proper adhesion to the glass and stable guidance of the window edge. This component limits the ingress of water and contaminants into the door interior, which supports the durability of the window regulator mechanism and seals.

Thanks to its factory profile and precisely selected shape, the trim helps maintain the correct contact geometry between the window and the door, which is important for both acoustic comfort and moisture protection in the rear part of the passenger cabin.

Construction, fitment, and color

The window rail seal is a component tailored to a specific area of the bodywork – the rear right side of the vehicle. Its design is prepared for installation in factory mounting points, which facilitates service and reduces the time required for replacement. The black color allows for a consistent match with most door frame trim configurations, maintaining a neutral, original look.

The properly profiled working edge of the trim interacts with the glass surface, minimizing the risk of scratches and reducing noise resulting from window operation during opening and closing.

Product characteristics and service application

The component comes from a Mercedes vehicle and is intended for use as a service part in the rear right door area. The used nature of the product makes it a cost-effective solution while maintaining proper structural fit to the bodywork.

The trim will be particularly useful in situations where the existing element has suffered mechanical damage, deformation, or operational wear, manifesting itself, among other things, in poorer water drainage from the window surface or reduced acoustic comfort in the rear of the cabin.

Benefits of installing the window rail seal

Using a properly selected window rail seal in the rear right door allows you to:

• limit the ingress of water and dirt into the door structure,
• reduce the risk of accelerated corrosion of internal components,
• improve the operation of the window regulator mechanism,
• maintain the aesthetic appearance of the window edge and door frame.

For the user, this means more stable window operation and the maintenance of the factory character of the side bodywork, without the need to use aftermarket solutions with uncertain fitment.

Mercedes Doors and door panels – expansion and repairs

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other components from the same group, such as panels, reinforcements, or additional trims, check out the available parts in the Mercedes Doors and door panels category.

How to optimize repair costs with used parts

Choosing a used window rail seal allows you to reduce service costs while maintaining structural compatibility with the bodywork. It is worth paying attention to the origin of the component and its fitment to the specific body variant to avoid installation problems.

If you want to better plan your repair budget and consciously use the OEM used parts market, the following guide may be helpful: Rising repair costs and the boom in used parts – how to save on car service?.