Mercedes W169 W245 Petrol Fuel Pump Sender Unit A1694700494

Mercedes W169 W245 Petrol Fuel Pump Sender Unit is an original fuel system component designed for A-Class and B-Class models, responsible for both pumping petrol and precisely measuring the fuel level in the tank. Thanks to its factory design for the Mercedes brand, it ensures proper supply pressure and stable operation with the vehicle's instrument cluster and electronics. This is a practical solution for users looking for a proven, used part with its technical functionality preserved.

Specifications and technical data

• SKU: A1694700494
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1694700494
• Substitutable numbers: A1694700494, A 1694700494, A 169 470 04 94
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Function in the petrol supply system

The fuel pump integrated with the sender unit in W169 and W245 models is responsible for two key tasks: delivering fuel from the tank to the engine and transmitting information about its level to the gauge. For petrol-powered units, the proper operation of this assembly has a direct impact on:

• stable engine starting under various operating conditions,
• smooth engine performance across the full load range,
• reliable fuel level readings on the dashboard,
• proper cooperation with the vehicle's diagnostic systems.

By maintaining the original design, the fuel system remains consistent with the manufacturer's factory specifications, which reduces the risk of compatibility issues.

Construction of the fuel pump and sender unit assembly

This element belongs to the Fuel pumps and level sensors group, which means that the pumping mechanism and the fuel level sensor are integrated into a single housing. This solution simplifies installation and maintenance, as the replacement is carried out as one complete module, without the need to separately match the pump and the sender unit.

Factory manufacturing for the Mercedes brand ensures proper fitment to the fuel tank, correct positioning of the sender unit, and electrical compatibility with the vehicle's wiring harness. This is particularly important in modern systems, where the signal from the fuel level sensor is used not only for dashboard readings but also in the engine control logic.

Benefits of using an original used fuel pump

Using an original fuel pump module with a sender unit in a Mercedes W169 or W245 allows you to maintain the performance parameters intended by the vehicle manufacturer. In practice, this means:

• maintaining the correct operating pressure in the petrol supply system,
• correct signal characteristics from the fuel level sensor,
• no need for modifications to the electrical or fuel installation,
• easier diagnostics in case of any potential future faults.

A used OEM element is a reasonable compromise between cost and functionality – especially for vehicles used on a daily basis, where reliability and compliance with factory parameters are essential.

Selection, compatibility, and technical aspects

To ensure full compatibility with a specific engine version and model year, it is worth verifying the part's compliance using the OEM number or by matching it to the vehicle's VIN. This selection method minimizes the risk of purchasing an element with different electrical characteristics or a different pump basket shape, which could result in incorrect installation or disruptions in the fuel system's operation.

In the case of modules that interact with vehicle electronics, the general principles of component selection and verification, described in the Global Parts guide, may also be useful: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. Although the article focuses on controllers and sensors, the approach to compatibility and technical markings presented there is also helpful when choosing fuel system components.

Expanding Mercedes fuel system service

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 pump modules, level sensors, or complete fuel basket assemblies, check the available parts in the Mercedes fuel pumps and level sensors category.

This approach allows you to take care of the entire fuel system in one service stage, reducing the risk of subsequent vehicle downtime and additional costs associated with re-removing the fuel tank.