Mercedes CLS X218 Rear Sealing Frame Doors Right O/S Gasket A2187301478

Mercedes CLS X218 Rear Sealing Frame Doors Right O/S Gasket is a precisely fitted body component designed for the rear right door area of the CLS estate model (X218). It is responsible for ensuring a tight door seal, reducing noise, and protecting the interior from moisture and contaminants, while simultaneously providing stable guidance for the door leaf within the body frame. Thanks to its original geometry, the gasket maintains the factory body line and cabin acoustic comfort.

Specifications and technical data

• SKU: A2187301478
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2187301478
• Substitutable numbers: A2187301478, A 218 730 14 78
• Location on the vehicle: Rear, Right
• Category: Door Seals

Purpose and technical function

The offered gasket is a component from the Door Gaskets category, designed specifically for the rear right section of the Mercedes CLS X218 body. Its task is to create a continuous, flexible barrier between the body frame and the door leaf, which translates into:

• limiting the ingress of water and moisture into the interior,
• reducing wind noise and external road noise,
• stabilizing the door position relative to the frame,
• reducing vibrations and rattling when driving on uneven surfaces.

By maintaining the correct profile and material hardness, the gasket supports proper door closing and the maintenance of even gaps between body panels.

Original fitment for Mercedes CLS X218

The rear right door frame gasket has been developed for a specific body model, which ensures factory-fit alignment with the frame and door skin. Properly profiled corners, straight sections, and guide points allow for installation without the need for modifications or trimming of the material.

Such fitment is particularly important in the rear right zone, where the body geometry of the CLS X218 estate requires maintaining the correct line of creases and sealing at the contact point with the tailgate and the side pillar. Using an original gasket allows for maintaining the structural and visual consistency of the entire side of the vehicle.

Performance characteristics and installation benefits

The rear right door frame gasket for the Mercedes CLS X218, despite being a used component, retains its key functional properties. In practice, this means:

• maintaining flexibility in the working areas adjacent to the door,
• proper adhesion to the frame surface and door edges,
• the ability to be installed in place of a worn or damaged element without interfering with the body structure.

Installing the gasket in the rear right part of the vehicle helps restore acoustic comfort and reduce air drafts, which is particularly noticeable at higher speeds. Additionally, a properly selected gasket reduces the risk of corrosion at critical contact points between the door and the body.

Importance for comfort and interior protection

A functional door frame gasket in a Mercedes CLS X218 has a direct impact on the daily comfort of using the vehicle. It is responsible for maintaining a stable microclimate inside, limiting the penetration of moisture, dust, and cold air. Proper sealing of the rear right door zone:

• protects upholstery and trim elements from dampness,
• supports the efficiency of the heating and air conditioning system,
• reduces noise levels in the cabin, which improves travel comfort on longer journeys.

For users who value consistency and the refinement of the bodywork, replacing a worn gasket with an original component is a simple way to restore the vehicle's original insulation properties.

Expansion of service work scope

If you are planning a comprehensive repair or upgrade of the door zone in your Mercedes and need other elements from the same group, such as front door frame gaskets, sill gaskets, or additional sections of perimeter seals, check the available parts in the Mercedes Door Gaskets category.

To compare how premium manufacturers approach maintaining the brand's character and the role of original components in maintaining factory quality, it is worth reading the article Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?, which shows how properly selected elements influence the long-term operation of high-end cars.