Mercedes W205 Window Guide Rail Frame Seal Door Rear Left N/S A2057356100

Mercedes W205 Window Guide Rail Frame Seal Door Rear Left N/S is an original body component designed for the rear left door area in Mercedes W205 class models. This precisely molded frame and window guide seal ensures a tight window fit, stable guidance within the rail, and reduction of noise and vibrations while driving. Thanks to its factory fitment, it serves as a practical solution for post-collision repairs, replacing corroded components, or resolving window closing issues.

Specifications and technical data

• SKU: A2057356100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2057356100
• Substitutable numbers: A2057356100, A 205 735 61 00
• Location on the vehicle: Rear, Left
• Category: Door Seals

Purpose and function in the bodywork

The window frame and guide seal in the rear left door is responsible for several key operational tasks:

• sealing the window perimeter against the door frame,
• stable window guidance during raising and lowering,
• preventing water and moisture from entering the door interior,
• reducing wind noise at higher speeds.

By maintaining the correct profile and flexibility, this component helps preserve cabin acoustic comfort and ensures the proper operation of the window lifting mechanism.

Why choose an original Mercedes seal

For components such as window guides and seals, factory fitment has a direct impact on the tightness and durability of the repair. The original seal for the Mercedes W205 provides:

• a frame and guide channel shape consistent with the body design,
• proper material stiffness and flexibility in areas prone to bending,
• correct adhesion to the window edge and door panel,
• compatibility with factory mounts and clips in the rear door.

Such a fit reduces the risk of rattling, looseness, or leaks that often occur with components of imprecise dimensions.

Condition of the component and service application

The offered seal is in used condition, which in practice means the possibility of an economical repair while maintaining the manufacturer's original specifications. This solution is particularly beneficial for:

• post-accident repairs of the rear left door,
• replacing worn or perished seals causing noise and leaks,
• problems with smooth window operation in the guide,
• bodywork restoration where maintaining the factory design is a priority.

Selecting a component from the same model line allows for maintaining the technical and visual consistency of the entire door assembly.

Mounting compatibility and installation zone

The seal is intended for installation in the rear left door, in the area of the window frame and guide. The component's design is prepared to work with the factory window lifting mechanism and the standard door frame in the Mercedes W205. With proper installation, you achieve:

• stable window guidance throughout the entire range of motion,
• even pressure against the window edge along the entire perimeter,
• preservation of the factory fit line against the bodywork.

Such properties are important both from the user's comfort perspective and for protecting the door interior from excessive moisture.

Expanding the door area in your Mercedes

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, guides, or soundproofing elements, check out the available parts in the Mercedes door seals category.

For drivers who are simultaneously performing broader drivetrain service and considering the use of original used components, useful information on the cost-effectiveness of such solutions can be found in the article Humming differential? Find out why a used OEM drive axle is a better investment than an uncertain replacement.