Mercedes W164 Diesel Fuel Tank Filler Neck Pipe Hose OM629 OM642 A1644703020

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W164 Diesel Fuel Tank Filler Neck Pipe Hose OM629 OM642 is a fuel system component designed for diesel engines, ensuring stable and safe transport of diesel fuel from the filler neck to the tank. A properly selected fuel filler hose is crucial for system tightness, correct venting, and convenient refueling. Thanks to a design consistent with Mercedes engineering, this component allows you to maintain the factory characteristics of the fuel system.

Specifications and technical data

• SKU: A1644703020
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644703020
• Substitutable numbers: A1644703020, A 164 470 30 20
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The described fuel filler pipe is part of the Fuel tanks and filler pipes group, responsible for safely delivering diesel fuel to the tank in vehicles with diesel engines. The hose construction is adapted to OM629 and OM642 units, which allows for maintaining proper fuel flow, reducing the risk of airlocks, and ensuring correct interaction with the tank ventilation system.

A properly selected fuel filler hose minimizes the risk of leaks, facilitates refueling, and supports the stable operation of the entire fuel system. This is particularly important in diesel engines, where the quality of fuel delivery affects engine performance, component durability, and operational safety.

Compatibility with diesel engines

The filler pipe has been designed to work with the fuel system in vehicles with diesel engines, meaning it is adapted to the operating parameters of diesel fuel, its density, and typical operating conditions. Diesel fuel type requires appropriate material resistance to long-term contact with fuel and additives, as well as dimensional stability across a wide temperature range.

Thanks to a design consistent with solutions used by the Mercedes brand, the hose works with the factory mounting system and pipe routing within the body, which facilitates installation and allows for maintaining the original geometry of the fuel line path.

Performance characteristics and installation

The element has been prepared as a replacement part for the factory fuel filler system, which helps maintain the vehicle's standard functionality. Using this component allows for an economical repair while maintaining compliance with the manufacturer's design solutions. In practice, this means:

• the ability to restore the original routing of the fuel filler hose,
• maintaining proper tightness after correct installation,
• compatibility with the factory fuel tank and mounting system.

When replacing the hose, it is recommended to check the condition of seals, mounting clamps, and mating components to ensure long-term and stable operation of the fuel system.

Technical support and selection by part numbers

This fuel filler hose has a dedicated OEM part number and interchangeable numbers, which facilitates precise identification and selection of the correct element for a specific vehicle configuration. Verification by manufacturer numbers helps avoid fitment issues and ensures compatibility with the fuel system of a given unit.

For users who want to deepen their knowledge about the diagnostics and operation of the fuel system, the article describing the principles of operation and component selection by VIN and OEM numbers will be useful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. You will find practical tips there regarding work with the tank and fuel filler elements.

Expansion of fuel system modernization

If you are planning a comprehensive repair or modernization of the fuel system area in your Mercedes and need other elements from the same group, such as additional filler hoses, connectors, or connection elements, check the available parts in the Mercedes fuel tanks and filler pipes category.

When planning broader service work, especially before the winter season, it is also worth familiarizing yourself with practical tips regarding the inspection of used components in the vehicle: winter essential for used car parts. This will allow you to better plan the inspection of fuel system elements and related sub-assemblies.

Summary

Mercedes W164 Diesel Fuel Tank Filler Neck Pipe Hose OM629 OM642 is a technically matched fuel system component designed for vehicles with diesel engines of this series. It enables the restoration of proper fuel flow to the tank, maintaining tightness and compliance with the factory Mercedes design. It is a practical solution for users who expect a functional, original-compliant part for professional fuel system repair.