Mercedes W203 Rear Right Door O/S Seal Gasket Weatherstrip A2037300278

Mercedes W203 Rear Right Door O/S Seal Gasket Weatherstrip is a precisely fitted component from the Door upholstery category, designed for the rear right area of the vehicle body. It is responsible for a tight door seal, noise reduction, and protecting the interior from moisture, which directly impacts acoustic comfort and the durability of the upholstery. Thanks to its factory profile and correct shape, it is a practical solution for body repairs in Mercedes C-Class W203 models.

Specifications and technical data

• SKU: A2037300278
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2037300278
• Substitutable numbers: A2037300278, A 203 730 02 78
• Location on the vehicle: Rear, Right
• Category: Door Panels

Purpose and function of the door seal

The described seal is intended for installation in the rear right part of the body, within the passenger door area. Its function is to:

• limit the penetration of water and moisture into the vehicle interior,
• reduce wind noise and external noise,
• stabilize the edge of the door upholstery against the bodywork,
• improve door closing comfort by properly sealing the perimeter.

Thanks to its factory profile, the seal works in harmony with the door structure and body frame, ensuring predictable performance during operation and maintaining the correct contact geometry.

Benefits of using original Mercedes door upholstery

The component from the Door upholstery group dedicated to the Mercedes W203 allows for maintaining the structural and visual consistency of the side of the body. Using an original seal translates into:

• better fit to the shape of the door and pillar,
• reduced risk of leaks compared to universal replacements,
• maintenance of the factory level of acoustic comfort,
• aesthetic finish of the contact point between the upholstery and the bodywork.

This solution is especially recommended when replacing damaged or perished seals, when maintaining the original performance parameters of the vehicle is a priority.

Installation characteristics and application

The seal is prepared for operation in the rear right zone of the vehicle, which facilitates the identification of the correct installation location. When installed correctly, it ensures:

• stable seating on the edge of the door or frame,
• even pressure around the entire perimeter,
• proper cooperation with the door lock and hinges.

Due to its factory origin from a Mercedes vehicle, the seal retains the correct cross-section and flexibility appropriate for this model, which promotes trouble-free use after replacement.

Product condition and service application

The offered seal is a used component, which makes it an attractive solution for workshops and users looking for a reasonable compromise between repair costs and maintaining the original vehicle specification. In practice, this allows for:

• lowering the costs of servicing the rear part of the body,
• maintaining the original door contact geometry,
• consistency with other door upholstery elements.

This is a good solution for local post-collision repairs, replacing corroded body parts, or restoring older W203 units.

Complementary Mercedes door upholstery elements

If you are planning a comprehensive repair or modernization of the side area in your Mercedes and need other elements from the same group, such as door panels, trim strips, or additional seals, check the available parts in the Mercedes door upholstery category.

For users interested in optimizing repair costs while using original parts, the article describing the advantages of using second-hand components may be helpful – more information can be found in the material on economical servicing with used OEM parts.