Mercedes W211 Diesel Fuel Tank Filler Neck Pipe Hose A2114703720

Mercedes W211 Diesel Fuel Tank Filler Neck Pipe Hose is an original fuel system component designed for Mercedes E-Class W211 generation models with a diesel engine. It is responsible for the safe and leak-proof delivery of diesel fuel to the tank, which is crucial for the stable operation of the entire fuel system. Thanks to its factory geometry and perfect fit for the W211 body, installation is precise and requires no modifications, ensuring the refueling system maintains parameters consistent with the manufacturer's standards.

Specifications and technical data

• SKU: A2114703720
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2114703720
• Substitutable numbers: A2114703720, A 211 470 37 20
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The fuel filler pipe in a Mercedes W211 acts as a conduit connecting the filler cap to the fuel tank. For diesel units, it is particularly important to maintain tightness and the correct pipe diameter in order to:

• ensure efficient refueling without fuel kickback or excessive foaming,
• reduce the risk of diesel leaks in the wheel arch and chassis area,
• maintain proper ventilation of the filler area in accordance with the manufacturer's design specifications.

By using a dedicated filler pipe for the W211, you maintain the original routing of the line, which is important for both safety and the durability of the component during long-term operation.

Compatibility with diesel engines

The presented pipe has been designed to work with a Diesel fuel system. This means the use of materials and cross-sections adapted to the properties of diesel fuel and the typical operating conditions in diesel-powered cars, such as:

• more frequent refueling during high annual mileage,
• contact with diesel fuel additives,
• exposure to a wide range of temperature fluctuations.

As a result, the filler pipe maintains dimensional stability and appropriate resistance to operational factors characteristic of diesel-powered vehicles.

Benefits of using an original pipe

Using an original filler pipe in a Mercedes W211 allows you to maintain the factory parameters of the fuel system. In practice, this means:

• secure fit to the body – proper mounting at the points provided by the manufacturer, without tension or unnatural bends,
• maintaining the correct filler geometry, which facilitates refueling at gas stations,
• reducing the risk of corrosion and damage to other components in the wheel arch area thanks to proper pipe routing.

For users who drive their Mercedes on long routes, replacing a worn or leaking pipe with an original component is a simple way to improve safety and the comfort of daily vehicle maintenance.

Component condition and service application

The offered fuel filler pipe is a component from the Fuel tanks and filler pipes category, intended for service use in Mercedes W211 vehicles. It is suitable both for typical replacement of a worn pipe and during major work on the fuel system, e.g., when removing the tank or performing repairs in the wheel arch area. Choosing an original component allows you to maintain the structural integrity of the entire fuel system.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other components from the same group, such as vent lines, connectors, or mounting hardware, check out the available parts in the Mercedes fuel tanks and filler pipes category.

Technical support and knowledge about the fuel system

When working on the fuel system, it is worth relying on reliable technical knowledge – especially regarding diagnostics, selecting components based on manufacturer markings, and operating principles. To better understand how the filler pipe works with the tank, pumps, and injectors, read the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration", where you will find practical tips, comparison tables, and answers to frequently asked questions.