Mercedes W164 Diesel Fuel Tank Filler Neck Pipe Hose A1644703920

Mercedes W164 Diesel Fuel Tank Filler Neck Pipe Hose is an original fuel system component designed for diesel engine models. It ensures safe and leak-proof fuel delivery from the filler cap to the tank, which is crucial for the stable operation of the entire fuel system. This solution is dedicated to users who are looking for proven, factory-spec geometry and fitment instead of universal replacements.

Specifications and technical data

• SKU: A1644703920
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644703920
• Substitutable numbers: A1644703920, A 164 470 39 20, A1644710060, A 164 471 00 60, BG
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The fuel filler neck pipe in the Mercedes W164 is responsible for the controlled flow of diesel fuel from the filler neck to the tank, minimizing the risk of leaks and fuel aeration. In vehicles with a Diesel engine, the tightness and proper routing of the pipe are of particular importance due to the high requirements of the injection system. Using the correct component from the Fuel tanks and filler pipes category reduces the risk of venting issues, dashboard error messages, and the unpleasant smell of fuel around the vehicle.

Construction and fitment for Mercedes W164

The fuel filler neck pipe is designed for the specific architecture of the W164 body, ensuring it maintains the correct path relative to the wheel arch, tank, and suspension components. The appropriate shaping of the cross-section and mounting points allows for:

• stable mounting without material stress,
• maintaining the correct gravitational fuel flow,
• reducing the risk of rubbing against other chassis components.

Such fitment translates into trouble-free installation and the preservation of the factory operating parameters of the fuel system in the Mercedes.

Characteristics of the used component

The offered fuel filler neck pipe comes from dismantling, which means it is a used part, but still intended for further use. In practice, this allows for an economical repair of the fuel system while maintaining the original design. A used element from this group is particularly attractive where the following are important:

• factory fitment to the body and tank,
• maintaining the original fuel flow diameter,
• compatibility with existing mounts and covers.

Thanks to this, you can restore the proper operation of the fuel filler without the need for modifications or the use of adapters.

Benefits of using a dedicated fuel filler neck pipe

Using the correct fuel filler neck pipe in the Mercedes W164 affects not only the comfort of refueling but also operational safety. A properly selected component helps to:

• reduce the risk of fuel leaks in the chassis area,
• maintain stable operating conditions for the diesel fuel system,
• ensure compliance with factory routing of lines and covers.

For users who want to keep the vehicle in a configuration close to the factory state, choosing such a component is a practical and technically sound solution.

Technical support and selection by part numbers

The fuel filler neck pipe is a component associated with specific catalog numbers and interchangeable numbers, which facilitates its identification and selection for a given vehicle. When purchasing, it is worth verifying compatibility by part numbers as well as by model and engine version to ensure full compatibility with the fuel system. In case of doubt, it is helpful to compare the shape and mounting points with the element currently installed in the car.

Fuel system expansion and educational materials

To better understand the role of the fuel filler neck pipe in the entire fuel supply system, it is worth reading the guide describing the operation of injectors, pumps, and the fuel tank, as well as diagnostics and part selection by VIN/OEM numbers – this is discussed in detail in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. This allows you to consciously plan repairs and upgrades, as well as better assess the condition of other 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 filler hoses, tank connectors, or additional pipe sections, check the available parts in the Mercedes fuel tanks and filler pipes category.