Fuel Pump Mercedes W204 W212 M271 Petrol Sender Delivery Unit Module A2124701394

Fuel Pump Mercedes W204 W212 M271 Petrol Sender Delivery Unit Module is an original fuel system component designed for M271 series petrol engines in Mercedes W204 and W212 class models. Integrating the fuel pump function with the fuel level sensor ensures stable power supply to the engine and precise fuel level readings, which translates into reliable fuel system operation and comfort in daily use. This is an OEM solution that allows you to maintain factory engine performance parameters without compromise.

Specifications and technical data

• SKU: A2124701394
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2124701394
• Substitutable numbers: A2124701394, A 212 470 13 94
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The presented pump with sender unit is a component of the Fuel pumps and level sensors category, responsible for both pumping petrol from the tank and monitoring its quantity. In M271 petrol engines, the use of a complete in-tank module allows for:

• maintaining proper fuel pressure at the fuel system inlet,
• stable engine power supply across the entire load range,
• continuous fuel level measurement and signal transmission to the instrument cluster,
• reducing the risk of air entering the system when fuel levels are low.

As a result, the driver receives a clear fuel level reading, and the engine operates under conditions consistent with the manufacturer's specifications.

Benefits of using the original module

Using the original pump with sender unit in a Mercedes W204 or W212 allows for consistency with the factory fuel system design. Key advantages include:

• Compatibility with the electrical installation and engine control unit – no need for wiring modifications or signal adaptation.
• Properly selected operating parameters for petrol engines – performance characteristics matched to the requirements of the M271 unit.
• Correct cooperation with the float and fuel gauge on the dashboard – minimization of incorrect readings and level "fluctuations".
• Consistency with the fuel tank design – proper module seating and connection tightness.

For the user, this means predictable vehicle behavior, easier diagnostics, and the ability to follow service procedures provided by the manufacturer.

Technical and operational characteristics

The pump with sender unit has been designed to work with petrol fuel, which is crucial for the correct selection of the component for a specific vehicle. The module design includes:

• material resistance to long-term contact with petrol and fuel additives,
• integrated fuel suction system from the bottom of the tank,
• mechanical float working with a fuel level potentiometer,
• adaptation for installation in the factory service opening of the tank.

The component comes from a Mercedes vehicle and is offered in used condition, which allows for economical repair while maintaining the original design specifications.

Selection, installation, and diagnostics

To correctly select the pump module with sender unit for a specific body and engine version, it is worth using the manufacturer's markings and vehicle data. In service practice, it is important to:

• verify the compatibility of the component with the fuel system of the specific vehicle,
• check the condition of electrical connectors and fuel lines before installation,
• perform a pump operation test and check fuel level readings after installation,
• pay attention to the tightness of the seal at the top of the tank.

This reduces the risk of having to re-access the fuel tank and ensures stable operation of the fuel system.

Technical support and educational materials

For users who want to better understand the principles of the fuel system, diagnostics, and component selection by manufacturer numbers, the article describing injectors, pumps, and the fuel tank will be helpful – Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. The information contained therein facilitates repair planning and informed selection of spare parts.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other components from the same group, such as in-tank pump modules, fuel level sensors, or complete supply units, check the available parts in the Mercedes fuel pumps and level sensors category.