Mercedes W168 OM668 Fuel Pump Sender Tank Level Sensor Unit A1684702094

Mercedes W168 OM668 Fuel Pump Sender Tank Level Sensor Unit is an original fuel system component designed for precise fuel level measurement in the tank and stable engine fuel supply. Thanks to the factory Mercedes design, this used component ensures proper compatibility with the electrical system and the dashboard gauge, facilitating diagnostics and the restoration of accurate fuel level readings. It is a practical solution for fuel system repairs in A-Class W168 models with the OM668 unit.

Specifications and technical data

• SKU: A1684703794
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1684703794
• Substitutable numbers: A1684703794, A 168 470 37 94, A1684702094, A 168 470 20 94
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The presented unit combines the functions of a fuel pump and a level sensor in one housing, which is a typical solution for compact Mercedes A-Class W168 models. The component is responsible for:

• pumping fuel from the tank to the OM668 engine fuel supply system,
• continuous measurement of the fuel level in the tank,
• transmitting the signal to the gauge on the instrument cluster,
• stable operation of the fuel system under various operating conditions.

Thanks to the integrated design, the number of connections and potential leaks is reduced, and installation and removal are simplified. A properly functioning pump and level sensor module has a direct impact on driving comfort, safety, and accurate vehicle range diagnostics.

Compatibility and OEM selection

The component was designed specifically for the fuel system of the Mercedes A-Class W168 generation with the OM668 diesel engine, with the design adapted for fuel supply according to the specified technical parameters. Selection is based on the OEM part number and interchangeable numbers, which allows for precise matching to a specific equipment version and model year.

To avoid compatibility issues, it is recommended to verify compliance using the OEM number, reference numbers, or the vehicle's VIN. The original Mercedes solution guarantees proper operating parameters, the correct electrical characteristics of the sensor, and accurate fuel level indications on the factory instrument cluster.

Performance characteristics and installation benefits

As an item from the Fuel pumps and level sensors category, this module is crucial for the stable operation of the fuel supply system. Replacing a worn or damaged unit with an original used component allows you to:

• restore proper engine starting and operation,
• obtain reliable fuel level indications on the dashboard,
• minimize the risk of sudden engine stalling due to fuel supply interruptions,
• reduce diagnostic errors related to the fuel system.

A used OEM component is a reasonable compromise between repair costs and maintaining factory operating parameters. Factory geometry and electrical connectors facilitate installation in place of the old component without the need for system modifications.

Condition, origin, and service application

The offered module comes from dismantling and is classified as used, which means it may show signs of wear typical for aftermarket parts, while maintaining the functionality required for further use. This type of component is particularly useful for:

• fuel system repairs after a pump failure,
• resolving issues with incorrect fuel level readings,
• regeneration or modernization of the fuel supply system in older W168 units,
• optimizing service costs while maintaining the original specification.

For workshops and private users, this means the possibility of quickly replacing a faulty module with a verified component, without the need to use replacements of uncertain quality. Using an original component also facilitates subsequent computer diagnostics of the fuel system.

If you are planning a comprehensive repair or modernization of the fuel system area in your Mercedes and need other components from the same group, such as pumps, level sensors, or power modules, check the available parts in the Mercedes fuel pumps and level sensors category.

Technical support and knowledge about the fuel system

To better plan your repair, select the appropriate module by OEM number or VIN, and understand the relationships between the pump, injectors, and tank, it is worth using expert materials. Practical information on diagnostics, regeneration, and operation can be found in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses typical symptoms of failures, service procedures, and the most frequently asked user questions.