Mercedes-Benz Sprinter W906 Fuel Filler Cap Tank Cap Cover Black A0004703105

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes-Benz Sprinter W906 Fuel Filler Cap Tank Cap Cover Black is a factory-original refueling system component designed for diesel-powered vehicles. It is responsible for tightly sealing the filler neck, which promotes the proper operation of the diesel fuel system and prevents contaminants from entering the tank. Finished in black, it blends well with most body configurations and equipment.

Specifications and technical data

• SKU: A0004704605
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0004704605
• Substitutable numbers: A0004704605, A 000 470 46 05, A0004703105, A 000 470 31 05
• Fuel type: Diesel
• Color: Black
• Category: Fuel Tank Caps

Purpose and technical function

Mercedes-Benz Sprinter W906 Fuel Filler Cap Tank Cap Cover Black has been designed for diesel fuel systems, where tightness and resistance to operating conditions are of key importance. A properly selected cap:

• stabilizes pressure conditions within the fuel tank,
• reduces diesel fuel evaporation,
• protects against the ingress of water, dust, and other contaminants into the filler neck,
• supports the correct operation of fuel system components, such as the pump and injectors.

The neutral black color makes it easy to match with the factory body finish and equipment, maintaining a consistent, understated look for the refueling area.

Construction and performance properties

The cap belongs to the Fuel filler flaps and caps group, meaning it is a component that works directly with the filler neck and the external flap. The design intended for diesel fuel is engineered taking into account the specific properties of diesel oil, such as density and evaporation characteristics.

Well-thought-out geometry and properly selected working materials result in:

• secure seating on the filler neck,
• repeatable, tactile closure,
• stable performance under the vehicle's varying operating temperatures.

Component condition and installation aspects

The offered cap is an aftermarket component, which allows for an economical replacement while maintaining factory performance characteristics. This type of part is particularly useful in situations where the existing cap has suffered mechanical damage, seal wear, or has been lost.

In practice, installation is usually limited to:

• removing the old cap from the filler neck,
• checking the socket for dirt,
• seating the new component and verifying proper closure.

This action restores proper fuel filler operation without interfering with other system components.

Benefits of a properly selected diesel fuel cap

A functional fuel cap in a diesel vehicle affects the comfort of daily operation and the stability of the fuel system. The most important advantages include:

• Fuel system protection – reducing the risk of contaminants entering the tank, which is important for the durability of injectors and the pump.
• Maintaining proper tank conditions – helping to maintain appropriate pressure and ventilation parameters.
• Aesthetic finish of the refueling area – the black cap blends well with most paint colors and exterior elements.

Combined with regular fuel system maintenance, this helps reduce the risk of typical failures associated with contaminated fuel.

Related components and technical knowledge

If you are planning a comprehensive repair or upgrade of the fuel filler area in your Mercedes and need other components from the same group, such as additional caps, flaps, or filler neck covers, check the available parts in the Mercedes fuel filler flaps and caps category.

To better understand the impact of filler tightness on the entire fuel system, it is worth reading the material describing the diagnostics and operation of fuel components – you will find practical information in the article "Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration".

For users of vehicles with the star who want to take broader care of engine equipment and the fuel system, a guide dedicated to the popular engines of this brand may also be helpful – see the article on the reliability of engine equipment in Mercedes C-Class and E-Class models.