Mercedes W177 Window Trim Frame Cover Door Rear Left N/S Black A1777352501

Mercedes W177 Window Trim Frame Cover Door Rear Left N/S is a precisely fitted body component designed for the rear left door area in W177 series models. This original trim from the Window seals and trims category helps maintain proper window guidance, reduce wind noise, and improve the aesthetics of the side body section. The black color ensures a consistent, neutral finish with factory body components.

Specifications and technical data

• SKU: A1777352501
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1777352501
• Substitutable numbers: A1777352501, A 177 735 25 01
• Location on the vehicle: Rear, Left
• Color: Black
• Category: Window Seals, Gaskets & Trims

Purpose and function of the component

The rear left door window trim frame cover for the Mercedes W177 is responsible for stable window guidance and proper sealing of the area between the glass and the door. A correctly selected component:

• limits the ingress of water and contaminants into the door interior,
• reduces wind noise at higher speeds,
• supports the smooth operation of the window lifting mechanism,
• maintains the aesthetic side line of the vehicle body.

Thanks to its dedicated placement in the rear left part of the vehicle, the trim is structurally matched to the door geometry, which translates into secure seating and stable window operation.

Construction, color, and fitment

The black window trim frame cover has been designed for visual consistency with factory seals and other door trim elements. The neutral shade facilitates installation in versions with both dark and lighter styling accents, maintaining a discreet, original look.

The original origin from the Mercedes brand ensures the preservation of the correct geometry, mounting points, and contact profile with the glass and door panel. As a result, the trim does not require additional adjustments after installation, and the contact line with the glass remains uniform along its entire length.

Condition, service application, and benefits of installation

This used component serves as a service solution when replacing a damaged, bent, or corroded window trim frame cover. In practice, installing such a component allows you to:

• restore the proper fit of the glass to the frame,
• reduce unwanted noises from the door area while driving,
• limit the risk of moisture entering the door structure,
• maintain the factory look of the side body section without altering the styling.

Choosing an original window trim frame cover is particularly important in vehicles where maintaining compliance with factory assembly standards and proper cooperation with the window lifting mechanism is essential.

Integration with other body components

The rear left window trim frame cover works in conjunction with door perimeter seals, window guides, and exterior panels. A correctly selected component minimizes stress in the contact zone between the glass and the frame, which promotes a longer service life for the lifting mechanism and reduces the risk of play and rattling when closing the door.

If you are planning a comprehensive repair or upgrade of the window area in your Mercedes and need other elements from the same group, such as additional trims, window frame seals, or window trim components, check the available parts in the Mercedes window seals and trims category.

Additional technical and operational information

Before installation, it is recommended to verify the compatibility of the trim with the specific W177 body version and to check the condition of the window guides and perimeter seals. Replacing the trim is particularly advisable after side collisions, bodywork or paint repairs, or when there is a noticeable increase in noise in the rear cabin area.

For users interested in a broader context regarding the selection of original, used components instead of refurbished solutions, the following article describing the approach to repairing mechanical sub-assemblies may be helpful – see why an original used part is often a more sensible choice than regeneration.