Mercedes W177 Diesel Fuel Filler Pipe Fuel Tank Neck Line Hose A1774700400

Mercedes W177 Diesel Fuel Filler Pipe Fuel Tank Neck Line Hose is a component from the Lines, hoses and pipes group, designed for the diesel fuel supply system in the W177 generation A-Class model. It is responsible for the safe and leak-proof delivery of diesel fuel from the filler neck to the tank, which is crucial for the reliable operation of the vehicle. A used OEM component is a sensible choice for drivers looking for a proven solution at an attractive price.

Specifications and technical data

• SKU: A1774700400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1774700400
• Substitutable numbers: A1774700400, A 177 470 04 00
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Function and role of the fuel filler pipe in the Mercedes W177

The fuel filler pipe in the Diesel version plays an essential role in the fuel supply system – it is responsible for the leak-proof and stable routing of fuel from the filler cap to the tank. In the case of modern Mercedes diesel engines, the correct geometry and fitment of this component reduce the risk of leaks, air ingress, and issues with tank venting. The original design ensures proper routing of the line relative to the bodywork and other sub-assemblies, which facilitates installation and subsequent maintenance.

Why it is worth choosing an original element from the Lines, hoses and pipes group

In the fuel system of a diesel engine, the following are particularly important: material resistance to diesel fuel, dimensional stability, and compliance with factory specifications. The used OEM Mercedes W177 fuel filler pipe:

• retains factory mounting points and routing, which facilitates installation in original brackets,
• is designed specifically for the Diesel system, taking into account fuel characteristics and operating conditions,
• reduces the risk of leaks in the filler area, which could lead to fuel odors or bodywork contamination,
• ensures compatibility with the factory cap and filler neck.

Thanks to this, choosing an original line from the Lines, hoses and pipes category allows you to maintain the consistency of the entire fuel system with the solutions provided by the vehicle manufacturer.

Intended for diesel engines

The presented fuel filler pipe is dedicated to vehicles powered by diesel fuel, which is significant both in terms of material and construction. The element is adapted to:

• the characteristics of Diesel fuel, including its chemical properties,
• the typical usage pattern of diesel cars, often driven on longer routes,
• requirements regarding leak-tightness and safety in modern Mercedes fuel systems.

Selecting the correct fuel filler pipe for the specific fuel type reduces the risk of premature wear and operational problems, while supporting the stable operation of the entire fuel supply system.

Used condition and benefits of choosing OEM parts

A used original element is a practical solution for users who want to keep their vehicle in line with factory specifications while optimizing repair costs. In the case of the Mercedes W177 fuel filler pipe, this means:

• maintaining factory fitment to the bodywork and fuel tank,
• no need for modifications or fitting aftermarket replacements with uncertain geometry,
• more predictable behavior in the long term.

For workshops and individual users, this means faster installation and a lower risk of complaints related to leaks or improper routing of the line.

Complementary Mercedes fuel system components

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other elements from the same group, such as additional lines, flexible hoses, or rigid guide pipes, check the available parts in the Mercedes Lines, hoses and pipes category.

If you are interested in a broader context of selecting used OEM elements in the drivetrain and want to better understand why original components are often a better choice than random replacements, it is worth reading the article: Humming differential? Find out why a used OEM drive axle is a better investment than an uncertain replacement.