Mercedes C238 Outside Window Rail Seal Rear Left Sealing Strip Trim A2386709100

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes C238 Outside Window Rail Seal Rear Left Sealing Strip Trim is a precision-fitted body component designed for the rear left window of the coupe body style. It is responsible for the aesthetic finishing of the glass edge and for providing a stable seal where the glass meets the body panel, which reduces wind noise and moisture penetration. The profile, finished in black, helps maintain a consistent, factory-original look for the side body line.

Specifications and technical data

• SKU: A2386709100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2386709100
• Substitutable numbers: A2386709100, A 238 670 91 00
• Location on the vehicle: Rear, Left
• Color: Black
• Category: Doors & Door Skins

Purpose and function in the bodywork

The described trim-seal is a component mounted in the rear part of the body on the left side, in the area where the glass meets the frame. Its tasks include:

• sealing the glass edge against the side body panel,
• limiting the ingress of water and contaminants into the door structure or side panel,
• reducing wind noise at higher speeds,
• aesthetically closing the side body line.

Thanks to the use of a dedicated profile matched to the specific body model, the trim ensures stable guidance of the glass edge and proper adhesion along its entire length.

Construction, color, and fitment

The trim is manufactured as an element integrated with the seal, which facilitates installation and maintenance of the window area. The black color is visually neutral and blends well with both light and dark paint finishes, maintaining the brand's characteristic understated look. The profile has been designed with the specific shape of the rear window and adjacent sheet metal in mind, which translates into:

• secure seating in factory mounting points,
• proper adhesion to the glass and bodywork,
• no need for modifications or forced fitting.

Such a solution allows for maintaining the consistency of the side line and minimizes the risk of leaks after replacing the component.

Installation characteristics and application

The component is intended for installation in the rear left part of the vehicle, in the side window area. Due to its design, which complies with Mercedes factory solutions, the trim works with original mounts and body geometry. In practice, this means:

• the ability to restore proper seal pressure against the glass after a collision or disassembly,
• reducing the risk of rattles and vibrations in the rear window area,
• easier inspection of the condition of the glass edge and adjacent sheet metal elements.

The product is suitable for both post-accident repairs and for replacing a worn or deformed trim that no longer adheres properly to the glass.

Condition, origin, and benefits of choosing a used component

The offered trim-seal comes from the used parts segment, which allows for economical repair while maintaining original geometry and material characteristics. For body components such as window trims, choosing a used component is often a sensible solution because:

• original profiles retain the correct shape and fit to the glass,
• the material is already "settled" from real-world operating conditions,
• the cost of repair remains at a reasonable level while maintaining a factory appearance.

For conscious owners of German cars, the following guide material may also be useful – you can find more on this topic in the article Renovation and repair of German cars – which used parts are worth buying?.

Integration with other Mercedes body components

When working in the side window area, it is worth treating trims, seals, and sheet metal as a cohesive system. If you are planning a comprehensive repair or upgrade of the door and side window area in your Mercedes and need other elements from the same group, such as exterior window trims, edge seals, or door panels, check the available parts in the category Mercedes Doors and Door Panels.

Summary

Mercedes C238 Outside Window Rail Seal Rear Left Sealing Strip Trim is a functional body component that combines a sealing role with an aesthetic finish for the vehicle's side line. Its dedicated placement in the rear left part of the body and black color allow for restoring the factory look and proper window sealing, which translates into acoustic comfort and protection against external factors. Choosing an original, used component is a sensible way to perform a professional repair while maintaining the character and quality typical of the Mercedes brand.