Mercedes C118 W177 W247 Diesel Fuel Filler Fill in Tank Cover Cap A0004704400

Mercedes C118 W177 W247 Diesel Fuel Filler Fill in Tank Cover Cap is an original refueling system component designed for diesel-powered vehicles. It ensures a tight seal for the tank neck, stabilizing the fuel system's operation and limiting diesel evaporation. Thanks to its factory origin, the cap is precisely matched to the filler design in selected Mercedes models, facilitating easy installation and daily use.

Specifications and technical data

• SKU: A0004704400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0004704400
• Substitutable numbers: A0004704400, A 000 470 44 00
• Fuel type: Diesel
• Category: Fuel Tank Caps

Purpose and technical function

The presented cap belongs to the Fuel filler flaps and caps group and is responsible for the controlled closure of the filler in diesel-powered Mercedes cars. Its task is to maintain proper sealing of the tank neck, which affects correct venting, safety during refueling, and protection of the fuel system against external contaminants.

A properly selected fuel filler cap helps reduce the risk of moisture, dust, and foreign objects entering the tank, which is particularly important in modern diesel units with sensitive injection systems. Stable closure of the filler also translates into user comfort – no unwanted "open filler" messages and correct interaction with the vehicle's fuel system.

Compatibility with Mercedes C118, W177, W247 models

The cap has been designed for specific Mercedes body types, such as the C118, W177, and W247, which means it matches the filler neck geometry and assembly standards used in these generations. As a result, the user receives a component that:

• is structurally compliant with the factory solution used in the given body type,
• ensures proper seating and secure closure of the filler,
• minimizes the risk of leaks resulting from the use of an unsuitable replacement.

Selecting a cap according to the manufacturer's specifications allows for consistency with other fuel system components and facilitates potential future diagnostics.

Performance characteristics and condition of the item

The offered fuel filler cap is a used item, which in practice means it comes from disassembly and may show signs of wear typical for this group of parts. At the same time, it retains the functionality necessary for continued use in a diesel vehicle. For many users, this is a cost-effective solution that allows for restoring the full efficiency of the refueling system without the need to invest in a new part.

Choosing an original, used fuel filler cap is a reasonable compromise between price and maintaining factory fitment parameters. OEM design reproduction promotes trouble-free installation and correct interaction with the existing filler neck and body equipment.

Importance for the diesel fuel system

In diesel-powered vehicles, the quality and tightness of fuel-related components have a direct impact on the durability of injectors, pumps, and the tank itself. The fuel filler cap, although small, is part of this system – its proper operation supports maintaining the correct operating conditions of the system. For users who want to better understand the relationships between individual components, the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses the diagnostics and operation of modern fuel systems, will be helpful.

Expansion of Mercedes fuel filler modernization

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

By using original components from this group, you can consistently renew the filler area, improving both functionality and body aesthetics. This is particularly important in modern models, where precise fitment of external elements affects daily usage comfort and limits the risk of contaminants entering the refueling zone.