Mercedes W177 Fuel Filler Pipe Fuel Tank Neck Line Hose Petrol A1774701700

Mercedes W177 Fuel Filler Pipe Fuel Tank Neck Line Hose is an original fuel system component designed for W177 series models with petrol engines. It is responsible for the controlled discharge of fuel vapors from the filler area, which supports stable fuel system operation and proper tank ventilation. Thanks to its factory design, the part maintains full compatibility with the body geometry and fuel system, facilitating installation and subsequent operation.

Specifications and technical data

• SKU: A1774701700-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1774701700
• Substitutable numbers: A1774701700, A 177 470 17 00
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The fuel filler vent hose in the Mercedes W177 operates in the immediate vicinity of the fuel cap and filler neck, ensuring proper flow of petrol vapors between the tank and other system components. A properly functioning element:

• stabilizes pressure in the fuel tank during refueling and driving,
• reduces the risk of fuel kickback during filling,
• supports the correct operation of the vapor emission control system,
• reduces the load on other fuel system components.

In vehicles powered by petrol, the tightness and patency of the vent hose have a direct impact on refueling comfort and engine stability under various load conditions.

Construction and fitment for Mercedes W177

Mercedes W177 Fuel Filler Pipe Fuel Tank Neck Line Hose has been designed as a component dedicated to the body and fuel system architecture of this generation. The properly profiled geometry of the hose allows for:

• collision-free routing in the space between the body and the tank,
• proper positioning relative to the factory mounting points,
• maintaining the required flow diameter for fuel vapors.

The original Mercedes origin promotes compatibility with factory connectors, which translates into connection tightness and reduces the risk of leaks in the filler area.

Characteristics of the used part

The offered hose comes from dismantling and is sold as a used part. This type of component in the fuel system, when used correctly, retains its functional properties for a long time, which is why it is a reasonable solution for vehicle repairs and maintenance. Choosing a second-hand element allows you to:

• maintain consistency with the manufacturer's original specifications,
• reduce repair costs while maintaining the factory design,
• limit the risk of installation problems typical of replacements with different geometry.

Benefits of using the original vent hose

Replacing a worn or damaged vent hose with an original part from the same model platform brings a number of practical benefits. The most important include:

• Stable fuel system operation – proper tank ventilation reduces pressure fluctuations and supports even fuel supply to the petrol engine.
• Refueling comfort – proper vapor flow reduces the risk of the fuel nozzle clicking off and speeds up the tank filling process.
• Better cooperation with the vapor emission system – maintaining factory hose patency facilitates the operation of fuel vapor control systems.
• Hassle-free installation – the fit to the W177 design shortens service time and limits the need for system modifications.

Integration with other system elements and part selection

When planning work in the area of the tank and fuel filler, it is worth paying attention to the condition of other system components – clamps, connectors, and adjacent hoses. A consistent service approach avoids returning to the same repair and improves the reliability of the entire system. If you need other elements from the Lines, hoses, and pipes group for your vehicle, you can find them by using the link to the appropriate category: see more fuel system and piping components.

For drivers who are simultaneously upgrading the drivetrain or gear ratios, the guide material on drive units may also be helpful: check how to choose a drive axle and differential for your driving style. This allows for better planning of comprehensive vehicle work, combining fuel system service with other mechanical modifications.