Mercedes Vito W639 Fuel Filler Flap Cover Trim Carbon Black - 040 A6397540034

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 Fuel Filler Flap Cover Trim Carbon Black - 040 is an original body component from the Fuel filler covers and accessories group, designed to protect the fuel filler area and provide an aesthetic finish to the side of the vehicle. The Carbon Black - 040 finish ensures color consistency with the factory paint and restores the vehicle's original appearance following damage or corrosion of the flap.

Specifications and technical data

• SKU: A6397500304-CBL1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6397500304
• Substitutable numbers: A6397500304, A 639 750 03 04, BG
• Color: Carbon Black - 040
• Category: Fuel Flaps & Components

Purpose and function of the component

The fuel filler flap cover in the Mercedes Vito W639 is responsible for protecting the fuel filler from dirt, moisture, and mechanical damage, while also streamlining the side profile of the body. A properly selected and installed component:

• reduces the risk of dirt and water entering the area around the fuel cap,
• stabilizes the fuel filler area during daily operation,
• ensures visual continuity of the side body surface.

Thanks to the preservation of factory geometry, the flap works with the standard opening and closing mechanism, which facilitates refueling and minimizes the risk of stress on the hinge and mounts.

Color and visual fit

The Carbon Black - 040 finish is essential for maintaining consistency with the vehicle's original paint. In practice, this means:

• easier matching to the factory Mercedes color palette,
• reducing the need for additional painting when replacing the component on vehicles in the same shade,
• aesthetic integration of the flap into the side body line without visible tonal differences (assuming the paint is properly maintained).

For users concerned with fleet appearance or a uniform image of commercial vehicles, maintaining the correct fuel filler flap color is both practical and important for the vehicle's image.

Product characteristics and condition

The offered cover comes from a Mercedes vehicle and is an original part, which translates into proper fitment with the bodywork and compatibility with factory mounting points. The product is in used condition, which in practice means it may show signs of previous use, but it retains the structural functionality required for further installation and use.

For body shops and service centers specializing in the Mercedes brand, this is a cost-effective solution for post-accident repairs where combining original geometry with reasonable parts costs is a priority.

Application in the fuel system and bodywork

The fuel filler flap cover operates at the interface between the fuel system and the side panel. Its correct selection and installation affect:

• protection of the fuel cap area against corrosion resulting from fuel residue and moisture,
• stability of the fuel filler recess edge,
• reduction of air drafts and dirt turbulence in this area.

For users who want to better understand the relationships between body components and the fuel supply system, an article describing the construction and operation of the entire fuel path will be helpful – detailed information can be found in the material Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Part selection and integration with other components

When selecting a fuel filler flap for a Mercedes Vito W639, it is crucial to consider the body generation, equipment version, and paint color. In workshop practice, replacing the flap is often combined with bodywork in the area of the fender, filler recess, and seals to restore the correct geometry and anti-corrosion protection of this area in one go.

If you are planning a comprehensive repair or upgrade of the fuel filler zone in your Mercedes and need other components from the same group, such as additional covers, mounts, or accessory protections, check the available parts in the Mercedes fuel filler covers and accessories category.