Mercedes CLS C218 Door Seal Rubber Gasket Rear Right O/S A2187302078

Mercedes CLS C218 Door Seal Rubber Gasket Rear Right is an original body component from the Door seals category, designed for installation on the rear right side of the vehicle. It ensures a tight door closure, reduces road noise and wind noise, and helps maintain a stable microclimate inside the car. This is a practical solution for users who want to restore factory functionality and acoustic comfort in their Mercedes.

Specifications and technical data

• SKU: A2187302078
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2187302078
• Substitutable numbers: A2187302078, A 218 730 20 78
• Location on the vehicle: Rear, Right
• Category: Door Seals

Purpose and function of the seal

The presented seal has been designed specifically for the rear right door of the CLS C218 body style. Its profile is matched to the shape of the door frame and adjacent body elements, which allows for stable seating and even pressure along the entire perimeter. As a result, it limits the ingress of water, dust, and cold air into the cabin, and also reduces unwanted vibrations and rattling while driving.

This component performs several key operational tasks:

• sealing the contact between the door and the body in the rear right part of the vehicle,
• dampening external noise and improving acoustic comfort,
• protecting the interior against moisture and dirt,
• stabilizing the door position through proper pressure of the rubber profile.

Construction and material properties

The seal is made of flexible rubber material selected for performance in variable weather conditions. The material retains its elasticity at low temperatures and is resistant to UV radiation and typical chemical agents encountered during vehicle operation. The properly shaped cross-section ensures:

• even pressure along the entire length of the door perimeter,
• compatibility with factory mounting points,
• stable adhesion to metal surfaces and plastic trim elements.

As a component dedicated to a specific Mercedes model, the seal works with the factory geometry of the door and body, which facilitates installation and reduces the risk of leaks after replacement.

Placement on the vehicle and installation

The seal is intended for installation in the rear right part of the vehicle, on the perimeter of the passenger door. Such placement requires maintaining the correct orientation of the element during installation so that the working profile adheres exactly to the contact surface with the body. In practice, installation involves seating the seal in the factory guides and clips and pressing it along its entire length, without the need for additional structural modifications.

To maintain full functionality, it is recommended to:

• thoroughly clean the contact surface before installation,
• check for correct positioning on the curves and corners of the door,
• verify door closure after installation, including evenness of pressure.

Performance characteristics of the used component

The offered seal is a used component, which in practice means it comes from vehicle dismantling and has been previously used. Such components are often chosen by users who are looking for a reasonable compromise between repair costs and maintaining the manufacturer's original specifications. In the case of door seals, it is important that the profile retains appropriate elasticity and shape, which allows for further trouble-free use.

Choosing an original, used seal for a Mercedes allows you to maintain material consistency with other body elements and preserve the ride comfort and acoustic insulation parameters characteristic of this brand.

Complementary Mercedes door seals

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements from the same group, such as additional perimeter seals, sill seals, or pillar seals, check the available parts in the Mercedes door seals category.

Additional technical support

When selecting body components, including door seals, it is often helpful to use catalog numbers and manufacturer data to ensure full compatibility with a specific vehicle version. For more advanced electronic components, such as control modules or sensors, it is worth reading guides on identification by numbers and installation principles – you can find practical tips in the article: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.