Mercedes W639 Diesel Complete Fuel Tank 75L A6394711401

Mercedes W639 Diesel Complete Fuel Tank 75L is a complete diesel fuel supply system component designed for Mercedes W639 series vehicles. This used fuel tank, integrated with a pump, provides a functional solution for workshops and users looking for a reliable component for professional repair or replacement of the fuel system.

Specifications and technical data

• SKU: A6394711401
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6394711401
• Substitutable numbers: A6394711401, A 639 471 14 01, A6394701694, A 639 470 16 94, A6394701494, A 639 470 14 94, BG
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The offered fuel tank with pump is part of the Fuel tanks and filler pipes category, responsible for the safe storage of diesel fuel and its stable delivery to other components of the supply system. The integrated pump ensures proper fuel pressure and flow, which directly impacts the performance of the diesel engine and the correct operation of the injection system.

This solution, dedicated to Mercedes W639 vehicles, allows for maintaining factory mounting geometry, hose routing, and the correct positioning of supply and return ports, which facilitates installation and reduces the risk of leaks.

Benefits of using a complete tank with pump

Using a complete fuel tank with a built-in pump in a Diesel engine vehicle offers a number of practical benefits:

• a cohesive tank and pump design reduces the number of connections and potential leak points,
• factory fitment for the Mercedes W639 fuel system simplifies service and reduces replacement time,
• maintaining the original fuel supply architecture promotes stable engine operation and proper venting,
• the ability to utilize the existing fuel installation without the need for modifying hoses or mounts.

The used component allows for cost-effective repair while maintaining a design consistent with the factory solution, which is particularly important for vehicles used intensively, e.g., in freight or passenger transport.

Technical aspects and selection by markings

The selection of a fuel tank with a pump for a specific Mercedes W639 unit should be based on manufacturer markings, OEM part numbers, and interchangeable numbers, which minimizes the risk of dimensional incompatibility or differences in port configuration. The product has assigned reference numbers that facilitate verification of compatibility with a specific body version and drivetrain.

For users and workshops that want to deepen their knowledge of fuel system diagnostics and operation, a guide describing the selection of components by manufacturer markings, bleeding procedures, and regeneration principles will be useful. A detailed discussion of these issues can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Condition, application, and service context

The offered fuel tank with pump is a used component, which allows for lower repair costs while maintaining the original design intended by the vehicle manufacturer. This type of solution is often chosen by workshops specializing in the service of commercial models, where both durability and cost-effectiveness of service are important.

Choosing a used component also fits into the trend of responsible vehicle operation and reducing waste in the automotive industry. You can read more about the benefits of reusing car parts, as well as economic and environmental aspects, in the material Eco-driving: discover the benefits of used car parts.

Expanding the fuel system in Mercedes vehicles

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 tanks, filler pipes, or vapor discharge hoses, check out the available parts in the Mercedes fuel tanks and filler pipes category.

Summary

Mercedes W639 Diesel Complete Fuel Tank 75L is a practical solution for users and workshops looking for an original diesel fuel supply system design in the form of a complete tank with a pump. The used component allows for a technically correct yet economical repair, while maintaining the proper mounting geometry and functionality intended for Mercedes W639 models.