Mercedes Benz A Class W168 Petrol Fuel Tank Pump Sender Unit A1684704094

Mercedes Benz A Class W168 Petrol Fuel Tank Pump Sender Unit is an original fuel system component designed for precise fuel delivery and reliable fuel level measurement in the tank. Thanks to its factory design for the first-generation Mercedes A-Class models, it ensures stable petrol engine operation and proper integration with the vehicle's instrument cluster and electronics. This is a particularly beneficial solution for repairs where compliance with factory specifications and a guaranteed fit are essential.

Specifications and technical data

• SKU: A1684704094
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1684704094
• Substitutable numbers: A1684704094, A 1684704094, A 168 470 40 94, BG
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The described module belongs to the Fuel pumps and level sensors category and is dedicated to petrol-powered Mercedes vehicles. It is responsible for maintaining the correct fuel pressure in the system, which is crucial for proper dosing by the injectors and stable operation of the engine across the full load range.

The built-in fuel level sensor transmits information about the amount of petrol in the tank to the gauge, allowing the driver to monitor range and plan refueling. Using an original solution minimizes the risk of incorrect readings, jerking during acceleration, or starting issues when fuel levels are low.

Benefits of using an original fuel pump

Using a factory-spec fuel pump module with a level sensor in the Mercedes A-Class W168 offers a number of practical benefits:

• maintaining fuel system operating parameters in accordance with the manufacturer's design,
• guaranteed fit for the fuel tank and the vehicle's electrical installation,
• consistent cooperation with onboard electronics and the fuel gauge,
• reduced risk of leaks and pressure drops in the system.

For users who expect predictable vehicle behavior after a repair, choosing this component is a safe and technically sound solution.

Technical characteristics and compatibility

The pump has been designed for use with petrol engines, meaning its hydraulic, material, and electrical construction is specifically tailored to this type of fuel. As a result, the component is resistant to typical operational stresses in petrol systems and ensures proper flow and operating pressure.

Original manufacturer markings and available replacement numbers allow for precise verification of compatibility with a specific version of the A-Class W168. In practice, this facilitates part selection by OEM number or reference numbers, which is particularly important given the wide variety of equipment and engine variants in the Mercedes range.

Condition, verification, and use in repairs

This component comes from the secondary market, allowing for an economical repair of the fuel system while maintaining the original design. Such components are often chosen in situations where a brand-new pump is expensive, and the priority remains maintaining compatibility with the vehicle's installation.

To better understand how to safely use pre-owned components in your car, it is worth checking the Global Parts guide regarding modules and sensors – you can find it in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?, where topics such as OEM number matching, compatibility issues, and practical installation tips are discussed.

Expanding the fuel system in the Mercedes A-Class

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

By using components from a single product group, you can consistently restore the entire fuel system, reducing the risk of subsequent leaks, pressure drops, or incorrect fuel level readings. This is particularly important for vehicles used daily, where reliability and predictable car behavior under various driving conditions are paramount.