Mercedes R172 M271 M274 M276 Fuel Tank Petrol Complete Fuel Unit A1724700401

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes R172 M271 M274 M276 Fuel Tank Petrol Complete Fuel Unit is an original fuel system component designed for Mercedes vehicles with petrol engines. The tank's construction ensures safe fuel storage, stable power unit supply, and proper integration with fuel system accessories. This used OEM component is a sensible choice for drivers looking for a technically matched solution at an attractive price.

Specifications and technical data

• SKU: A1724700401
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1724700401
• Substitutable numbers: A1724700401, A 172 470 04 01
• Weight: 150
• Fuel type: Petrol
• Category: Fuel Tanks & Filler Necks

Purpose and function in the fuel system

The tank belongs to the Fuel tanks and filler pipes group and is responsible for storing petrol and supplying it steadily to the fuel system. It is designed to work with engines from the M271, M274, and M276 families, which allows for maintaining the factory operating parameters of the power unit, including correct fuel pressure and proper vapor circulation.

This element serves as a key link between the fuel filler, fuel lines, and further components such as the pump or injectors. A properly selected tank minimizes the risk of leaks, venting issues, and disruptions in the fuel system's operation.

Construction, material, and performance parameters

The original Mercedes fuel tank is designed for high resistance to operational loads, temperature fluctuations, and contact with petrol and its additives. The tank's construction includes:

• dedicated chassis mounts tailored to the R172 platform,
• space for fuel system accessories (pump module, sensors, lines),
• a shape optimized for ground clearance and suspension geometry.

The properly selected weight of the component helps maintain the correct vehicle load distribution, and the tank's construction is prepared for use with petrol, which is significant for material durability and operational safety.

Condition, fitment, and installation

The offered tank is a used component, meaning it comes from dismantling and is intended for further use after proper installation. Choosing an original component from this group allows for maintaining factory mounting points, line routing, and compatibility with factory fuel system accessories.

Before installation, a standard workshop procedure is recommended: leak testing, verification of connection ports, and checking the condition of accessory sockets. This ensures the tank can be safely integrated into the vehicle's existing fuel system without the need for structural modifications.

Benefits of using an original fuel tank

• Factory fitment – maintaining the original geometry and mounting points facilitates installation and reduces workshop labor time.
• Fuel system consistency – compatibility with lines, the pump module, and sensors promotes stable petrol engine operation.
• Operational safety – construction designed for a specific platform and fuel type reduces the risk of leaks and venting problems.
• Economical solution – a used OEM component is a favorable compromise between cost, quality, and technical fitment.

Technical support and additional materials

To better understand the role of the fuel tank in the entire fuel system and to properly plan diagnostics and part selection by OEM numbers, it is worth using the guide: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. The article discusses the relationships between the tank, pump, and injectors and provides tips on how to avoid common faults.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other elements from the same group, such as additional tanks, filler pipes, or connecting lines, check the available parts in the Mercedes fuel tanks and filler pipes category.

For users who pay attention to environmental aspects and want to consciously choose parts from dismantling, we recommend the material: Sustainable automotive: How buying original used parts reduces the carbon footprint and protects the environment?, which describes the impact of reusing components on reducing the carbon footprint.