Mercedes W221 Rear Right Door O/S Window Rail Guide Seal Gasket A2217356625

Mercedes W221 Rear Right Door O/S Window Rail Guide Seal Gasket is an original body component designed for the rear right window of the luxury S-Class sedan. The precisely shaped sealing profile ensures a tight fit against the door frame, reducing noise, water ingress, and wind gusts. Thanks to the factory-fit design, this door seal helps maintain the acoustic comfort and aesthetics characteristic of the Mercedes brand.

Specifications and technical data

• SKU: A2217356625
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217356625
• Substitutable numbers: A2217356625, A 221 735 66 25
• Location on the vehicle: Rear, Right
• Category: Door Seals

Purpose and fitment

The seal has been designed specifically for the rear right window of the Mercedes S-Class W221 generation, taking into account the door geometry, window guides, and factory mounting points. This means the component maintains the correct rigidity, flexibility, and sealing line, which translates into stable window operation and reduced vibration while driving.

Due to its construction in accordance with the manufacturer's specifications, the seal works seamlessly with factory window lifting mechanisms without causing excessive resistance or leaks. This is particularly important in premium-class vehicles, where acoustic comfort and cabin sealing are crucial for the perceived quality of the ride.

Protective function and user comfort

The door window seal performs several important operational functions:

• limits the ingress of water and moisture into the door interior and cabin,
• reduces wind noise and external noise,
• stabilizes the window in the guides, improving the smooth operation of the mechanism,
• protects the window edges from direct contact with metal door components.

In practice, this translates into a more comfortable ride, a lower risk of window fogging, and reduced corrosion inside the door structure. A properly selected rear right window seal helps maintain the consistency of the body lines and preserves the factory character of the vehicle.

Characteristics of the original Mercedes component

Original seals used in the Mercedes W221 are designed for long-term use, utilizing rubber compounds selected for resistance to UV radiation, temperature changes, and chemicals used for car washing. As a result, the window sealing zone retains its flexibility and shape for a long time, which reduces the need for frequent replacements.

The item in this offer comes from dismantling, which in practice means it is a part with parameters consistent with factory standards, while simultaneously providing an economical solution compared to new components. For many Mercedes S-Class users, this is a sensible way to maintain a high standard of finish at controlled service costs.

Benefits of using a used original seal

Using a used, original door window seal in a Mercedes W221 brings several practical benefits:

• factory fit to the shape of the door and window,
• preservation of the consistent body line and vehicle aesthetics,
• reduction of noise and improvement of acoustic comfort inside the cabin,
• favorable cost-to-quality ratio compared to aftermarket replacements.

For owners of premium-class vehicles, it is particularly important that body components harmonize with the rest of the structure. That is why original sealing components are often preferred over cheaper alternatives with uncertain fitment.

Mercedes door seals – expansion and modernization

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

To better understand why used original body components are often more predictable in terms of fitment and durability than many replacements, it is worth reading the article OEM quality assurance and safety – why used original car parts are the best choice for your car?, which discusses in detail the advantages of OEM components in daily operation.