Mercedes W205 M274 Petrol Fuel Tank Complete Tank Reservoir A2054703900

Mercedes W205 M274 Petrol Fuel Tank Complete Tank Reservoir is an original fuel system component designed for petrol-powered vehicles, ensuring stable fuel storage and safe operation of the powertrain. Thanks to its factory design dedicated to a specific Mercedes generation, it maintains the correct geometry, mounting points, and compatibility with body components. This is a practical solution for users looking for a proven, used component with preserved functionality.

Specifications and technical data

• SKU: A2054703900
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2054703900
• Substitutable numbers: A2054703900, A 205 470 39 00
• Fuel type: Petrol
• Category: Moulding Strips

Purpose and function of the fuel tank

The fuel tank in W205 family models with the M274 engine is responsible for safe petrol storage and its stable delivery to the fuel system. The design is adapted to the Mercedes chassis architecture, which allows for maintaining the correct working capacity, ground clearance, and the layout of lines and mounts. This element works with the ventilation system, fuel lines, and body components, creating a coherent, leak-proof system.

As an original part, the tank is optimized for operation with a petrol engine, which helps maintain proper system pressure, reduce fuel evaporation, and preserve stable engine performance under various operating conditions.

Benefits of using an original fuel tank

Choosing an original fuel tank for the Mercedes W205 with the M274 engine allows you to avoid problems typical of replacements, such as inaccurate fitment or the need for mounting modifications. Thanks to the factory design:

• compatibility with factory mounting points is maintained,
• the layout of fuel and ventilation lines remains in the original configuration,
• the risk of leaks and incorrect positioning of the element under the chassis is minimized.

A used component of this type is particularly attractive for post-accident repairs or replacing a damaged tank, where reasonable cost is important while maintaining proper functionality and compliance with the vehicle's design.

Application in petrol vehicles

The presented tank has been designed to work with the petrol fuel system, which means appropriately selected materials and an internal structure adapted to this type of fuel. This is important for both the durability of the element and operational safety – proper resistance to fuel, additives, and temperature changes reduces the risk of material degradation over a long period of use.

Thanks to the fitment to the specific M274 engine configuration, the tank works with the fuel system equipment provided by the manufacturer, which helps maintain stable engine performance and facilitates the diagnosis of any potential faults.

Condition and service application

The item is offered as a used part, which makes it a practical choice for repairs where structural and functional compliance is key, while service costs remain an important factor. This type of component will work well when replacing a tank after mechanical damage, corrosion of mounting hardware, or interference with the chassis structure.

If you are planning broader work on the petrol fuel system, it is worth considering checking the lines, mounts, and accompanying elements so that the entire system works stably and safely after the tank is installed.

If you are planning a comprehensive repair or modernization of the body area in your Mercedes and need other elements from the same group, such as decorative strips, finishing tapes, or trim moldings, check the available parts in the Mercedes decorative strips and tapes category.

If you are also considering replacing other powertrain components and want to better assess the cost-effectiveness of purchasing used parts, an article discussing the practical aspects of such a decision may be helpful – you can find it here: Used gearbox – when is it worth it and what you need to remember.