Mercedes W211 Diesel Fuel Tank Filler Neck Pipe Hose A2114703720

Mercedes W211 Diesel Fuel Tank Filler Neck Pipe Hose is a precision component of the refueling system, designed for diesel-powered vehicles. As a part of the Fuel tanks and filler pipes group, it is responsible for a tight and stable connection between the filler pipe and the rest of the system, which is essential for operational safety and proper tank venting. Using a genuine pre-owned component is a sensible choice when servicing the fuel system of a Mercedes W211, ensuring structural fit and predictable installation.

Specifications and technical data

• SKU: A2114703720-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2114703720
• Substitutable numbers: A2114703720, A 211 470 37 20, A2114703464, A 211 470 34 64
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

Mercedes W211 Diesel Fuel Tank Filler Neck Pipe Hose operates at the connection point between the filler pipe and the fuel tank system in diesel-powered vehicles. It is responsible for:

• guiding fuel from the filler to the rest of the system,
• maintaining a tight connection under varying temperatures and vibrations,
• working with the tank venting components, which reduces the risk of vacuum or overpressure in the system.

Being dedicated to Diesel fuel means that the geometry and materials used are selected to match the properties of diesel fuel and the typical operating conditions in diesel engines.

Benefits of using a genuine filler neck

Choosing a component from the Fuel tanks and filler pipes group specifically designed for the Mercedes W211 helps reduce installation issues and ensures proper pipe routing. Key advantages include:

• maintaining factory connection geometry, which facilitates installation in existing brackets and guides,
• compatibility with the diesel fuel system in this model,
• the ability to use existing mounting points without modifying the installation.

Using a genuine pre-owned component is also a way to maintain the vehicle's structural integrity while optimizing repair costs.

Part selection and compatibility

The filler neck should be selected based on the part number and interchangeable numbers to ensure full compatibility with the specific body version and fuel system. In practice, this means:

• checking the OEM number in the vehicle documentation or on the old part,
• verifying reference numbers in the manufacturer's catalogs,
• considering the fuel type (Diesel) when comparing variants.

This approach minimizes the risk of mismatching diameters, outlet angles, or mounting points, which is crucial for the tightness and durability of the system.

Operation and safety significance

A functional fuel filler neck has a direct impact on refueling comfort and vehicle safety. Leaks in this area can lead to fuel spills, unpleasant odors, and problems with tank venting. A properly selected and correctly installed component:

• reduces the risk of leaks during refueling and driving,
• supports the stable operation of the diesel fuel system,
• helps maintain compliance with fuel vapor emission requirements.

To better understand the role of such components in the entire system, it is worth checking out the educational material: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, where diagnostics, part selection by numbers, and operating principles are discussed.

Expanding the fuel filler system service in a Mercedes

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 additional filler pipe sections, connectors, or guide elements leading to the tank, check out the available parts in the Mercedes fuel tanks and filler pipes category.