Mercedes W177 Fuel Filler Fill Flap Tank Cover Mountain Grey - 787 A1777571800

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W177 Fuel Filler Fill Flap Tank Cover Mountain Grey is an original body component from the Fuel filler flaps and accessories category, designed for a precise fit in the fuel tank filler area. This used component, painted in the Mineral Grey Metallic - B39 shade, allows for maintaining a consistent body style without the need for costly repainting of the entire part from scratch.

Specifications and technical data

• SKU: A1777571800-MG
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1777571800
• Substitutable numbers: A1777571800, A 177 757 18 00
• Color: Mineral Grau Metallic - B39
• Category: Fuel Flaps & Components

Purpose and technical function

The fuel filler flap in the Mercedes A-Class W177 generation plays a vital protective and functional role within the refueling system. It protects the cap and the filler neck from dirt, moisture, and mechanical damage, while maintaining the correct body geometry in the rear fender area. The original design ensures proper interaction with the hinge, opening mechanism, and factory seal, which translates into stable closing and consistent operation during daily use.

Color and visual fit

The element is factory-painted in the Mineral Grey Metallic - B39 shade, characteristic of the Mercedes palette. Thanks to this, the cover allows for an aesthetic match to a body of the same color, reducing the need for additional paint work to a minimum or eliminating it entirely if the vehicle's paint is in a similar condition. The metallic coating gives the body a cohesive, modern look while maintaining the structure and gloss typical of original parts.

Installation characteristics

As a part from the Fuel filler flaps and accessories group, the component is designed for the factory mounting points on the Mercedes W177 body. This means maintaining the correct curvature, dimensions, and body lines, which facilitates installation without interfering with the fender structure. In practice, this translates into:

• proper alignment with body edges,
• the correct gap between the cover and the bodywork,
• stable interaction with the opening and closing mechanism.

The used nature of the part allows for an economical repair of the fuel filler area after minor collisions, acts of vandalism, or operational damage, while maintaining the original geometry and appearance.

Condition and benefits of using an original part

The cover is offered as a used original Mercedes component, which in practice means maintaining factory material and dimensional specifications. Compared to low-budget replacements, the original part better maintains its shape, provides more stable mounting, and more predictable paint behavior over a long period of use. This is a particularly beneficial solution for repairs where both correct mechanical operation and visual consistency with the rest of the body are important.

Technical support and part selection

When selecting a fuel filler flap for a specific version of the Mercedes A-Class W177, it is worth paying attention to the compatibility of the body generation and paint color. It is helpful to use the OEM number or interchangeable numbers, which allow for precise verification of compatibility with a specific vehicle. For users interested in a broader context of the refueling system and fuel tank operation, an article describing the diagnostics and maintenance of the entire system will be useful – you can find it here: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

If you are planning a comprehensive repair or upgrade of the fuel filler area in your Mercedes and need other elements from the same group, such as additional flaps, covers, or mounting accessories, check the available parts in the Mercedes fuel filler flaps and accessories category.

Additional information about the advantages of using original, used components in cars of this brand is also provided in the guide: Mercedes – comfort, prestige, and durability. Why is it worth choosing original used parts?, which helps in consciously planning body and exterior repairs without overstretching the budget.