Mercedes W177 Gasket Fuel Fill In Neck To Body Protective Seal A1774710300

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W177 Gasket Fuel Fill In Neck To Body Protective Seal is a precision sealing component between the filler neck and the body, designed specifically for this generation of models. It is responsible for stable sealing of the fuel filler area, limiting the ingress of moisture and contaminants, and protecting the bodywork from unwanted contact with fuel. Thanks to its OEM factory design, it ensures a proper fit to the geometry of the body and the filler neck.

Specifications and technical data

• SKU: A1774710300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1774710300
• Substitutable numbers: A1774710300, A 177 471 03 00
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The described gasket belongs to the Fuel tanks and filler pipes group and operates at the critical contact point between the body and the filler pipe. Its task is to:

• limit the ingress of water, mud, and road salt into the area around the filler neck,
• stabilize the connection between the neck and the bodywork,
• protect the paint from prolonged contact with fuel vapors,
• help maintain the tightness of the filler area under typical operating conditions.

By being tailored to the specific Mercedes W177 platform, the gasket maintains the correct geometry and flexibility in the mounting area, which translates into predictable behavior during refueling and daily use.

Construction and fit for Mercedes W177

The fuel filler gasket has been designed as a component that works with the factory filler neck and body panel. The design provides an appropriate contact profile that:

• facilitates seating in the body socket without additional modifications,
• ensures even pressure around the entire circumference,
• minimizes the risk of play and unwanted vibrations in the filler area.

The original Mercedes origin means maintaining compliance with factory dimensional and material tolerances, which is essential for long-term tightness and proper cooperation with other fuel system components.

Component condition and installation aspects

The offered gasket is a pre-owned aftermarket component, which allows for an economical replacement while maintaining the manufacturer's original specifications. Before installation, a standard visual inspection of the working surfaces and cleaning of the body socket and filler neck are recommended to ensure even adhesion.

In a typical installation scenario, replacing the gasket does not require interference with the fuel tank itself, but only the removal of covers and trim elements in the vicinity of the filler. A correctly selected component allows for restoring the factory level of protection for the filler area without the need for additional modifications.

Benefits of using an original gasket

Using a factory fuel filler gasket in a Mercedes W177 brings a number of practical operational benefits:

• maintaining the filler area tightness as designed by the manufacturer,
• reducing the risk of corrosion around the filler socket,
• stable positioning of the filler neck relative to the body,
• material consistency with other fuel system components.

For users who want to consciously manage the technical condition of the fuel system, an article describing diagnostics and component selection will be useful – details can be found in the material Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Expanding Mercedes fuel filler service

If you are planning a comprehensive repair or upgrade of the fuel filler area in your Mercedes and need other components from the same group, such as filler necks, supply hoses, or mounting elements, check the available parts in the Mercedes fuel tanks and filler pipes category.

Additional tips regarding planning maintenance replacements and optimizing service costs can be provided by the driver's guide, available in the article TOP 10 most frequently replaced parts in your car.