Mercedes W177 Diesel Fuel Pump Level Control Sensor Sender Unit A2474706403

Mercedes W177 Diesel Fuel Pump Level Control Sensor Sender Unit is a precision fuel system component designed to work with the factory diesel system. It is responsible for accurate fuel level measurement in the tank and pump operation control, which translates into stable engine performance and correct readings on the instrument cluster. This used, original component is an excellent choice for professional repairs or replacing a damaged part in modern Mercedes W177 series models.

Specifications and technical data

• SKU: A2474706403
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2474706403
• Substitutable numbers: A2474706403, A 247 470 64 03
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The presented item belongs to the Fuel pumps and level sensors category and is dedicated to Mercedes vehicles with diesel engines. The unit combines the function of a fuel level sensor and pump control, ensuring the fuel system receives the right amount of fuel at the correct pressure, while providing the driver with reliable information about the fuel level in the tank.

In practice, this means:

• stable fuel supply to the diesel engine under various load conditions,
• proper cooperation with vehicle electronics and diagnostic systems,
• consistency of readings between the onboard computer and the fuel gauge on the dashboard.

Benefits of using an original module

Using an original sensor and pump control unit in a Mercedes W177 ensures high compatibility with the factory electrical installation and engine operating parameters. This is particularly important in diesel engines, where precise fuel dosage control affects engine refinement, performance, and fuel consumption.

Key advantages include:

• maintaining the factory operating characteristics of the fuel system,
• reducing the risk of engine control unit errors related to incorrect fuel level readings,
• easier service diagnostics due to compatibility with factory procedures and testers.

Characteristics for diesel engines

The module is designed for vehicles with diesel fuel systems, where requirements regarding fuel quality, system pressure, and pump stability are particularly high. In such designs, the proper operation of the level sensor and pump control affects not only driving comfort but also operational safety and the durability of injection components.

A properly selected and functional fuel level sensor with pump control helps reduce:

• the risk of air entering the system at low fuel levels,
• incorrect range and average fuel consumption readings,
• excessive pump load resulting from incorrect control.

Condition, installation, and service application

The offered item is in used condition, allowing for an economical repair of the fuel system while maintaining the manufacturer's original specifications. This type of component is particularly useful in situations where the existing fuel level sensor or pump control generates errors, reading fluctuations, or problems with starting and engine operation.

Before installation, a standard service procedure is recommended, including checking the electrical wiring, the condition of connectors, and the tightness of the fuel tank. A correctly installed module allows for restoring the proper operation of the fuel system without the need for a costly replacement of the entire tank.

Technical support and additional resources

To better understand the operation of the fuel system in diesel engines and the principles of selecting components by OEM numbers, it is worth reading our guide article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses the diagnostics, regeneration, and operation of key components.

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 pump modules, sensor units, or complete tank inserts, check out the available parts in the Mercedes fuel pumps and level sensors category.