Mercedes Vito W639 Diesel Complete Fuel Tank 75L A6394711901

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 Diesel Complete Fuel Tank 75L is a factory-spec fuel system component designed for the diesel versions of this model. Thanks to its design tailored to the Vito W639 chassis and a 75-liter capacity, it ensures stable fuel supply for the diesel engine and appropriate vehicle range. This is a solution for users who expect compatibility with the factory fuel system and wish to maintain the vehicle's original configuration.

Specifications and technical data

• SKU: A6394711901
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6394711901
• Substitutable numbers: A6394711901, A 639 471 19 01
• Fuel type: Diesel
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The offered tank is part of the Fuel tanks and filler pipes category, responsible for the safe storage of diesel fuel and integration with other fuel system components. The design intended for diesel units ensures proper venting, correct fuel flow, and stable engine operation under various load conditions.

The complete nature of the tank means it is ready for installation in place of the factory component, without the need to interfere with the original fuel system architecture. This reduces vehicle downtime and facilitates maintenance in both fleet applications and heavily utilized commercial vehicles.

Benefits of using an original diesel tank

Using a dedicated fuel tank for the diesel version of the Vito W639 translates into a number of practical advantages:

• preservation of factory geometry and mounting points on the chassis,
• compatibility with the original fuel line and venting system,
• appropriate 75-liter working capacity, beneficial for longer routes,
• consistency with the operating parameters of the diesel fuel system.

As a result, you maintain compliance with the manufacturer's specifications, which promotes stable engine performance and facilitates subsequent diagnostics and service.

Condition, selection, and practical application

The item comes from a used vehicle, which is typical for original body and chassis components in the commercial segment. Proper selection of the tank for a specific Vito W639 diesel version should always be confirmed based on vehicle documentation or manufacturer markings to avoid installation and sealing issues.

In practice, replacing the fuel tank is recommended in cases such as mechanical damage, corrosion, leaks, or interference with the chassis structure. Using an original solution allows for restoring the correct operation of the fuel system without the need to adapt universal components.

Technical support and further information on the fuel system

If you want to better understand how the fuel tank works with pumps and injectors in a diesel engine, it is worth consulting specialized materials. A detailed discussion on diagnostics, selection based on manufacturer markings, and operating principles can be found in the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration", which provides a clear overview of key technical information.

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 return lines, check the available parts in the Mercedes Fuel tanks and filler pipes category.

When choosing used fuel system components and other body/chassis elements, practical tips on purchasing second-hand parts can also be helpful – you will find them in the guide on the most common mistakes when choosing used parts for tuning and repairs, which allows you to better assess risks and consciously plan your vehicle investment.