Mercedes W221 Sedan Door Seal Rear Right O/S Top Window Frame Gasket A2217310780

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W221 Sedan Door Seal Rear Right O/S Top Window Frame Gasket is an original body component from the Door seals category, designed for the rear right side of the vehicle. It ensures a tight fit of the window within the door frame, reducing noise, vibrations, and water ingress into the cabin. This is a practical solution for users looking to restore factory acoustic comfort and proper window operation in their Mercedes.

Specifications and technical data

• SKU: A2217310780
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217310780
• Substitutable numbers: A2217310780, A 221 731 07 80
• Location on the vehicle: Rear, Right
• Category: Door Seals

Purpose and function of the seal

The presented seal is tailored to the rear right door window in W221 series models, ensuring an accurate reproduction of the frame shape and contact points with the bodywork. The component is responsible for:

• sealing the window perimeter against the door frame,
• reducing wind noise while driving,
• limiting the ingress of water and moisture into the interior,
• stable window guidance during raising and lowering.

This maintains comfort in the rear cabin area and ensures the window lifting mechanism operates under predictable conditions, without excessive resistance caused by improper rubber fitment.

Compatibility with Mercedes W221

The seal has been designed specifically for the W221 body style, taking into account the geometry of the rear right door pair. The appropriate cross-sectional profiling and corner shapes allow for installation in factory mounting points without the need for modifying the door frame or window.

Such fitment translates into:

• proper adhesion to the window edge and door metal,
• maintaining the correct body line in the rear window area,
• visual consistency with other seals in the vehicle.

Using a component dedicated to a specific model reduces the risk of leaks and premature wear of the window lifting mechanism.

Material and performance characteristics

The rubber window frame operates in a demanding environment – it is exposed to temperature fluctuations, UV radiation, moisture, and road contaminants. The flexible material used provides appropriate elasticity and the ability to compensate for minor deformations of the door and window.

In practice, this means:

• maintaining seal contact with the window around the entire perimeter,
• stable guidance of the glass edge in the track,
• reducing the risk of rattles and squeaks while driving.

The element is sourced from dismantling, which allows for maintaining the manufacturer's original specifications and consistency with other body components, while simultaneously optimizing repair costs.

Benefits of using an original door seal

Using an original rear right window seal in a Mercedes W221 allows for the restoration of factory sealing parameters and acoustic comfort. This is particularly important in premium class vehicles, where a reduced noise level in the cabin and stable operation of electric windows are expected.

Key advantages include:

• precise fit to the door frame – no need for cutting or adjusting universal profiles,
• maintaining consistency with the factory body structure – the seal works with existing tracks and fittings,
• the ability to restore proper window pressure against the frame, which reduces the "whistling" phenomenon at higher speeds.

Professional application and door area maintenance

Replacing the rear right window seal is often part of broader work in the door area – e.g., after body repairs, window lifting mechanism adjustments, or soundproofing renovation. In such situations, it is worth ensuring the consistency of all sealing elements within one side of the vehicle.

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 frame perimeter seals, lower threshold seals, or additional edge bumpers, check the available parts in the Mercedes door seals category.

For a comparison of how premium manufacturers approach maintaining the brand's character and the importance of original body and interior components, it is worth reading the article: Audi and emotions in their purest form – how used parts help maintain the brand's DNA.