Mercedes W177 Front Door Window Trim Seal Strip Left N/S High Gloss A1777254300

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W177 Front Door Window Trim Seal Strip Left N/S High Gloss is an original body component from the Doors and door panels group, designed for installation on the front left door. The high-gloss finish of the trim ensures a consistent look for the side body line, while the properly selected profile supports effective water drainage from the window surface.

Specifications and technical data

• SKU: A1777254300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1777254300
• Substitutable numbers: A1777254300, A 177 725 43 00
• Location on the vehicle: Front, Left
• Category: Doors & Door Skins

Purpose and function of the window trim seal strip

The window trim seal strip on the driver's side front door is responsible for stable window guidance and limiting the ingress of water and contaminants into the door interior. In combination with other seals, it creates a tight, orderly system that contributes to acoustic comfort and the durability of the window lifting mechanism.

Thanks to its precise fit to the W177 series body, the trim maintains the correct geometry of the door edge, which is essential for both aesthetics and the proper closing of the window in its guides.

Construction, finish, and placement

The component is designed for installation in the front – left side of the vehicle zone, on the upper edge of the door panel. The trim profile is adapted to the characteristic side line of the W177 body, which facilitates installation and ensures uniform pressure against the glass along its entire length.

The high-gloss surface finish allows for consistency with factory trims and other decorative door elements, ensuring that there are no visual differences between individual segments of the side body after replacement.

Benefits of using an original Mercedes trim

Using an original trim seal strip in the W177 model provides a number of practical benefits:

• secure window guidance within the door plane,
• limitation of water and dirt ingress into the door interior,
• preservation of the factory contact line between the window and the panel,
• consistent appearance with other trim elements.

This solution is particularly recommended for post-collision repairs, replacing corroded or damaged door components, and body restoration work where compliance with factory specifications is essential.

Characteristics of the used product

The trim comes from dismantling, which allows for maintaining compliance with the original assembly technology and materials used by the manufacturer. For many users, this is a reasonable compromise between repair costs and maintaining the factory standard of workmanship.

Before installation, it is recommended to perform a standard inspection of the trim's working surface and the mounting sockets in the door to ensure proper positioning relative to the window and to avoid stress during the operation of the lifting mechanism.

Selection by OEM number and purchase support

When selecting a trim seal strip for a specific W177 body version, it is crucial to compare the OEM number and the placement on the vehicle. In case of doubt, it is worth using the VIN number and service documentation to avoid errors between door and trim variants.

If you want to check step-by-step how to properly verify part compatibility by OEM number and VIN, the following article will be helpful: Guide: how to select the right car part by VIN and OEM number.

Related Mercedes body components

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