Mercedes W164 Diesel Fuel Delivery Sender Module Unit A1644701794

Mercedes W164 Diesel Fuel Pump Float A1644701794 is a component from the Fuel Pumps and Level Sensors category, designed for diesel engine fuel systems in Mercedes W164 vehicles. A used OEM part ensures factory fit, stable fuel system operating parameters, and predictable vehicle behavior in daily use.

Specifications and technical data

• SKU: A1644701794
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644701794
• Substitutable numbers: A1644701794, A 164 470 17 94
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and Function in the Fuel System

The presented fuel pump, integrated with a fuel level float, is dedicated to Diesel engines in the W164 body style. It is responsible for transporting fuel from the tank to further fuel system components and for precise fuel level measurement, transmitted to the instrument cluster. Thanks to its OEM design, proper pressure and performance characteristics are maintained, which translates to stable starting, smooth engine operation, and accurate on-board computer readings.

Construction and Key Technical Features

The fuel pump with float for the Mercedes W164 is designed as a complete solution mounted in the fuel tank. The integrated fuel level sensor works with the vehicle's electronics, ensuring consistency of readings with the factory software. The design intended for use with diesel fuel reduces the risk of cavitation, supports proper cooling and lubrication of working components, and maintains adequate flow across the full range of engine loads.

As an OEM component, the pump retains the original geometry of spigots, connectors, and mounting points, facilitating installation in the factory fuel tank module. Appropriately selected electrical parameters allow for compatibility with the standard wiring without the need for modifications to the harness or control unit.

Benefits of Using a Used OEM Pump

Using an original, used fuel pump with a float in a Mercedes W164 is a solution that combines controlled costs with the preservation of factory fuel system operating characteristics. Compared to low-budget aftermarket alternatives, an OEM part provides:

• parameter consistency with factory engine control unit settings,
• proper cooperation with the fuel level sensor and instrument cluster,
• appropriate mechanical fit to the tank and accessories,
• reduced risk of starting problems and rough idling.

For users who expect predictable vehicle behavior after repair, choosing an original pump with a float is often more cost-effective than experimenting with random aftermarket parts.

Condition, Installation, and Selection by Parameters

The offered fuel pump with float is a used part, which helps to reduce service costs while maintaining factory specifications. Before installation, standard workshop procedures are recommended: checking spigot seals, verifying electrical connectors, and checking the correct operation of the float within its working range. Selection for a specific vehicle instance should be based on data such as the vehicle identification number, engine type, and fuel system parameters to ensure full compatibility.

Technical Support and Additional Resources

If you are planning a comprehensive repair or upgrade of the fuel supply system in your Mercedes and need other components from the same group, such as additional pumps, level sensors, or power modules, check the available parts in the Mercedes Fuel Pumps and Level Sensors category.

For users interested in a broader context of using used electronic and measurement components in cars, a guide discussing selection by manufacturer codes, compatibility issues, and practical installation examples may be useful: Used Automotive Electronics On Board – Why Choose Second-Hand ECUs and Sensors?