Mercedes W221 Rear Left Right N/O/S Door Seal Rail Frame Trim Cover A2217350665

Mercedes W221 Window Frame Seal Left Right Rear is a precisely fitted body part from the Doors and Door Sheet Metal group, designed for the rear of the vehicle. The black window frame seal ensures a tight closure of the window, reduces wind noise, and supports the proper functioning of the door mechanism. This is a practical solution for users who want to maintain the factory acoustic comfort characteristics in their Mercedes.

Specifications and technical data

• SKU: A2217350665
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217350665
• Substitutable numbers: A2217350665, A 221 735 06 65
• Location on the vehicle: Rear, Right, Left
• Color: Black
• Category: Doors & Door Skins

Purpose and Vehicle Placement

The presented seal is a window frame element in the rear doors, prepared for installation on the left or right side. Its placement in the rear part of the body means it is responsible for the sealing of the passenger area, protection against water and dust, and reduction of air noise during high-speed driving.

The black color of the seal is consistent with the factory finish of most Mercedes W221 models, allowing the part to integrate harmoniously with the door line and window frame without altering the vehicle's styling.

Technical Function and Installation Benefits

The window frame seal in the Mercedes S-Class performs several key operational functions:

• creates a barrier between the window and the door frame, limiting the ingress of water and contaminants,
• supports maintaining the stable position of the window in its guides,
• reduces the penetration of external noise into the passenger cabin,
• helps maintain proper door closure against the body in the window area.

Thanks to the use of the original seal geometry, it is possible to maintain proper adhesion to the door frame and window, which translates into stable operating conditions for the window lifting mechanism and acoustic comfort inside. This is particularly important in a luxury model like the Mercedes W221, where a high level of body refinement is expected.

Visual Characteristics and Fitment

The black, uniform surface of the seal is stylistically neutral and matches the factory door finish. The part is intended for installation in the rear of the vehicle, on both sides of the body, which simplifies selection when replacing worn or leaky seals in the passenger window area.

Using a component from the Doors and Door Sheet Metal group with the correct profile helps avoid problems with door closure, improper window fit, or the appearance of unwanted noises during driving. This is a practical solution for repairs after collisions, door replacements, or gradual wear of flexible body elements.

Part Condition and Practical Application

The seal is from a dismantled vehicle, which allows for the preservation of its original geometry and operational characteristics as intended for this model. This type of part is particularly useful for:

• renovating the rear left or right door area,
• eliminating leaks appearing around the window frame,
• reducing cabin noise after window replacement or door adjustment,
• restoring factory acoustic comfort in a premium car.

Using an original window frame seal helps maintain the structural integrity of the door, which is important for both user comfort and the long-term operation of the vehicle.

Expanding Door Repairs on Mercedes

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other parts from the same group, such as panels, reinforcements, or additional structural elements, check the available parts in the Mercedes Doors and Door Sheet Metal category.

Owners of models from years close to the W221, interested in a broader vehicle modernization using parts from dismantled vehicles, may also be interested in an article describing practical scenarios for refreshing premium cars – you can find it here: Second Life for a Youngtimer – How Used Car Parts Revitalize Cars from 1998–2012.