Mercedes W212 Fuel Tank Level Sensor Sender Unit Diesel A2124700794

The Mercedes W203 Diesel Fuel Pump Sensor Float Unit is an original part from the Fuel Pumps and Level Sensors group, designed for diesel engine fuel systems. It ensures precise diesel fuel level readings and stable engine power supply, contributing to predictable injection system operation and comfortable vehicle use.

Specifications and technical data

• SKU: A2124700400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2124700400
• Substitutable numbers: A2124700400, A 212 470 04 00, A2124700794, A 212 470 07 94
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and Function in a Diesel Fuel System

The presented level sensor, integrated with the fuel pump and float, operates within the fuel tank, serving a Diesel engine. It performs two key tasks simultaneously: maintaining adequate fuel supply and transmitting current fuel level information to the instrument cluster. This provides the driver with a clear indication of the diesel fuel quantity and ensures stable operating conditions for the injection system.

Assembly Structure: Pump, Level Sensor, Float

The component forms a complete assembly mounted in the tank, comprising a fuel pump, a measuring track, and a float cooperating with the sensor. This design reduces the number of connections and hoses, thereby minimizing the risk of leaks and signal interference. Using a factory part ensures fuel flow parameters and indication characteristics consistent with the vehicle manufacturer's specifications.

Benefits of Using an Original Used Part

Choosing an original, used fuel pump assembly with a level sensor and float offers a sensible compromise between cost and quality. Such a component retains its factory geometry, mounting points, and electrical characteristics, facilitating installation and reducing the risk of compatibility issues. A used part of this caliber allows for the restoration of correct fuel level readings and stable fuel system operation without the need for a costly replacement of the entire module with a new one.

If you want to better understand how to safely select and install used measurement components in your car, it's worth consulting a guide describing the practical principles of selecting and installing automotive electronics and sensors – you can find it in the article Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?.

Selection, Compatibility, and Application in Mercedes

This part comes from the Mercedes brand, ensuring full compatibility with the factory fuel system architecture in the appropriate body and engine versions. When selecting, it is recommended to verify compatibility using the OEM part number and interchangeable numbers, as well as the vehicle's VIN – this helps avoid installation problems and ensures proper cooperation with the electrical system and the fuel gauge on the dashboard.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other parts from the same group, such as in-tank pump modules, fuel level sensors, or float assemblies, check the available parts in the Mercedes Fuel Pumps and Level Sensors category.

Condition, Installation, and Operation

The offered assembly is in used condition, which means it comes from a dismantled vehicle and has been verified for its suitability for further use. Installation is performed in the place of the original module in the fuel tank, using factory mounting points and connectors, which reduces work time and minimizes the risk of installation errors. After correct installation, the fuel system regains stable operating pressure, and the fuel gauge begins to display consistent, predictable readings.

A fuel pump assembly with a level sensor and float configured in this way is a functional solution for users who want to restore proper fuel system operation in their Mercedes with a diesel engine while maintaining a reasonable service budget.