Mercedes CLC-Class CL203 Door Seal Frame Gasket Left Right N/O/S A2036970551

Mercedes CLC-Class CL203 Door Seal Frame Gasket Left Right N/O/S is an original body component designed for the front door on the left or right side of the coupe body style. The black, custom-fit seal ensures a tight door closure, reduces wind noise, and improves acoustic comfort inside the cabin, while also providing protection against moisture and contaminants. It is a practical solution for users looking to restore the factory soundproofing and sealing parameters of their Mercedes.

Specifications and technical data

• SKU: A2036970551
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2036970551
• Substitutable numbers: A2036970551, A 203 697 05 51
• Location on the vehicle: Right, Left
• Color: Black
• Category: Door Seals

Purpose and function of the door seal

The presented seal is designed for the front driver and passenger doors in the coupe body style, suitable for both the left and right sides of the vehicle. Its task is to create a flexible barrier between the door edge and the bodywork, which helps reduce the ingress of water, dust, and air drafts into the cabin. This improves driving comfort and ensures the interior is better protected against external factors.

The black color of the seal is consistent with the factory finish of most Mercedes bodies, allowing for a uniform look along the door lines and pillars. Installing a properly selected seal is particularly important in coupe vehicles, where longer doors and the lack of a window frame require precise sealing of the perimeter.

Construction, material, and fitment

The seal belongs to the group of body components responsible for sealing and acoustics, which is why its profile is adapted to the shape of the front doors in the specific model. The flexible construction facilitates proper positioning on the edges, and the carefully selected material hardness allows for secure door closing without excessive resistance. As a result, the doors close smoothly while maintaining the required pressure against the bodywork.

Its original Mercedes origin ensures proper fitment with factory mounting points and sheet metal contours. In practice, this means less need for adjustments during installation and stable retention of the seal during operation.

Performance characteristics and benefits of installation

Replacing a worn or leaking seal with a functional component helps reduce common issues such as:

• increased noise at higher speeds,
• moisture ingress near the door sills and upholstery,
• unpleasant cold air drafts around the doors,
• deterioration of acoustic comfort inside the cabin.

Selecting the correct seal for a specific coupe body model helps maintain stable operating conditions for locks, hinges, and side windows, as the doors are pressed against the body in a manner close to the factory standard. This, in turn, can positively influence the durability of mechanical components in the door area.

Condition, color, and practical application

The offered item belongs to the Door Seals category and is in New Old Stock (N/O/S) condition, making it a sensible choice for maintenance and post-accident repairs where maintaining the original geometry and sealing profile is a priority. The black color facilitates integration with factory trim and door sill plastics, ensuring the seal does not stand out visually against other body components after installation.

Due to its suitability for both the left and right front sides of the vehicle, this part is ideal for both single-sided replacement after a collision and for the gradual restoration of seals throughout the entire front door area.

Comprehensive repair of the Mercedes door area

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

For post-collision body repairs or major bodywork and painting projects, it is worth checking out practical tips on selecting dismantled parts – you can find them in the article Bodywork and exterior – post-accident repairs using dismantled parts, which discusses, among other things, the principles of working with used OEM components and typical installation procedures.