Mercedes-Benz C-Class W203 Rear Left Right N/O/S Door Window Seal Gasket

Mercedes C W203 Rear Left Right Window Seal is a precisely fitted part from the Door Upholstery category, designed for the rear part of the body on the left and right sides. A properly selected window seal reduces noise, improves acoustic comfort, and helps maintain stable conditions inside the cabin, which is particularly important in Mercedes-class cars. Thanks to the use of an original design solution, the correct geometry of the window run and the seal at the junction of the glass and door upholstery are maintained.

Specifications and technical data

• SKU: A2037351665
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2037351665
• Substitutable numbers: A2037351665, A 203 735 16 65, AS
• Location on the vehicle: Rear, Right, Left
• Category: Door Panels

Purpose and Vehicle Placement

The presented window seal has been designed for installation in the rear part of the body, on the right and left sides. This means the part can be used on both sides of the vehicle, which facilitates servicing and allows for a consistent restoration of the factory finish of the rear passenger cabin.

Its placement in the rear door area means the seal works directly with the window and upholstery elements, responsible for:

• limiting air drafts at higher speeds,
• reducing window vibrations and rattles in the guides,
• stable window operation during raising and lowering.

Technical and Functional Characteristics

As a part of the Door Upholstery group, the window seal serves both a functional and finishing purpose. Its profile is adapted to the door construction of the Mercedes C W203 model, ensuring proper adhesion to the window and the edges of the upholstery. This reduces the risk of leaks that could lead to increased noise, unwanted vibrations, or accelerated wear of the window lifting mechanism.

The product comes from the Mercedes brand offering, which translates to maintaining factory dimensional standards and compatibility with original mountings. For the user, this means:

• easier installation without the need for modifications,
• correct fit with existing door upholstery,
• maintaining aesthetics consistent with the vehicle's interior design.

Item Condition and Service Application

The window seal is offered as a used part, allowing for economical repair while maintaining the original manufacturer's specifications. This type of solution is particularly beneficial for vehicles used daily, where a reasonable balance between repair costs and maintaining appropriate quality and fit is important.

Replacing a worn or deformed seal is recommended in situations where:

• increased air noise is present around the rear cabin,
• window play in the guides is noticeable,
• problems with the smooth operation of the window lifting mechanism occur.

Choosing a part consistent with the Mercedes C W203 construction allows for restoring correct window operation and acoustic comfort inside the vehicle.

Benefits of Using an Original Window Seal

Using a seal dedicated to a specific vehicle model brings a number of practical benefits. For the rear window seal of the Mercedes C W203, these are primarily:

• Compatibility with the factory door construction – maintaining the correct geometry and contact points with the window and upholstery.
• Stable window mechanism operation – reducing resistance and vibrations, which contributes to longer life of the window regulator.
• Improved acoustic comfort – reduction of noise and drafts, particularly noticeable when driving at higher speeds.
• Consistent interior appearance – maintaining aesthetics in line with the Mercedes design, without visible deviations in the upholstery line.

Selection of Other Parts and Service Knowledge

If you are planning a comprehensive refresh of the rear interior and need other parts from the door upholstery category for this brand, check the available parts in the Mercedes Door Upholstery category.

When planning repairs and optimizing operating costs, it is also worth expanding your knowledge on service strategies and the impact of part selection on the user's budget – the article Volkswagen 1.9 TDI vs 1.4 TSI – Evolution of VW Engines and Repair Costs, which shows a practical approach to using used parts in modern cars, may be helpful.