Mercedes W203 CL203 Tailgate Boot Trunk Rubber Seal Gasket A2037400278

Mercedes W203 CL203 Tailgate Boot Trunk Rubber Seal Gasket is an original body component designed for the W203 and CL203 series models, ensuring a tight seal for the tailgate. Thanks to its precise fit to the body structure, it effectively limits the ingress of water, dust, and noise into the luggage compartment. This is a practical solution for users who want to restore proper sealing of the rear part of the vehicle and improve driving comfort.

Specifications and technical data

• SKU: A2037400278
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2037400278
• Substitutable numbers: A2037400278, A 203 740 02 78, A 203 740 06 78, A2037400678
• Category: Door Seals

Purpose and function of the tailgate seal

The described seal is a perimeter component mounted on the edge of the tailgate or the body flange in Mercedes W203 and CL203 models. Its purpose is to:

• maintain a tight connection between the tailgate and the body,
• limit the ingress of moisture into the trunk,
• reduce noise and vibrations transmitted from the outside,
• stabilize the position of the tailgate when closing. A properly selected tailgate seal contributes to acoustic comfort inside the vehicle and protects the upholstery and electrical components in the cargo area from moisture.

Construction and fit for Mercedes W203 / CL203

The seal has been designed specifically for the body geometry of the W203 and CL203 series, which translates into proper adhesion to the edges of the tailgate and the bodywork. The working profile is adapted to factory mounting points, ensuring that:

• installation is predictable and orderly,
• there is no need to modify sheet metal edges,
• the contact line remains consistent with the factory design. The appropriate flexibility of the material allows for proper compression of the seal when the tailgate is closed, which is crucial for maintaining stable sealing over a long period of use.

Component condition and service application

The offered seal belongs to the Door seals category, but in this case, it serves as the tailgate seal for the Mercedes. As a used part, it provides a cost-effective service solution for users who:

• have noticed water leaks into the trunk,
• experience increased noise from the rear of the body,
• want to replace a worn or damaged seal with an original component. Using an original seal from a donor vehicle allows for maintaining factory fit and compatibility with the tailgate structure, which is essential for precise body components.

Benefits of replacing the tailgate seal

Regular inspection of the condition of seals in a car has a direct impact on the durability of the body and driving comfort. Replacing a worn tailgate seal in a Mercedes W203 / CL203 allows you to:

• minimize the risk of corrosion around the trunk sill and side recesses,
• protect the upholstery and electrical installation components from moisture,
• reduce window fogging from the rear of the vehicle,
• maintain the aesthetics and functionality of the cargo space. For users preparing their car for intensive use, including in harsher weather conditions, a well-maintained tailgate seal is one of the elements of preventive maintenance.

Related components and preparing the car for the season

When working on the rear part of the body, it is also worth verifying other seals and components exposed to moisture. Practical checklists and tips on preparing the car for lower temperatures, which you can find in the article Winter essentials: which used car parts are worth checking and replacing before the frost?, may be helpful. If you are planning a comprehensive repair or upgrade of the door zone in your Mercedes and need other components from the same group, such as additional perimeter seals, pillar seals, or threshold seals, check the available parts in the Mercedes door seals category.