Mercedes-Benz A-Class W168 Fuel Pump Delivery Unit Petrol A1684704294

Mercedes-Benz A-Class W168 Fuel Pump Delivery Unit Petrol is an original fuel supply system component designed for Mercedes vehicles with petrol engines. This used pump from the Fuel pumps and level sensors category allows for a technical, cost-effective replacement of a faulty component in accordance with factory specifications, maintaining the proper operating parameters of the powertrain.

Specifications and technical data

• SKU: A1684704294
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1684704294
• Substitutable numbers: A1684704294, A 168 470 42 94, BG
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel supply system

The fuel pump in the W168 model is responsible for the stable delivery of petrol from the tank to the fuel rail, maintaining the required operating pressure across the entire engine load range. A correctly selected component ensures:

• reliable engine starting under various operating conditions,
• smooth engine operation across the full RPM range,
• proper interaction with the fuel dosage control system.

Thanks to its factory-standard design, the pump is prepared for integration with the petrol injection system, which reduces the risk of compatibility issues and facilitates future diagnostics.

Benefits of using an original Mercedes fuel pump

Using an original component from the Fuel pumps and level sensors group allows you to maintain the integrity of the entire fuel supply system. In practice, this means:

• maintaining factory fuel flow and pressure parameters,
• proper interaction with sensors and the engine control unit (ECU),
• easier fitment during replacement thanks to standard mounting points and connectors.

A used OEM component is a cost-effective solution that is technically matched to the design of the Mercedes W168, which is particularly important for a precision petrol supply system.

Selection, installation, and technical aspects

When selecting a fuel pump for a Mercedes W168, it is crucial to ensure compatibility with the specific engine version and fuel system configuration. In practice, it is worth verifying:

• fitment for the body style and trim level,
• compatibility with the vehicle's electrical system,
• type of fuel used – in this case, petrol.

A properly selected pump allows for installation in place of the factory component without the need for system modifications, which shortens service time and reduces the risk of leaks or installation errors.

Condition and use in vehicle service

The offered fuel pump is a used component, which allows for an economical repair of the fuel system while maintaining the manufacturer's original specifications. This type of component is suitable both for a typical replacement of a worn-out pump and for comprehensive fuel system maintenance, e.g., after a failure related to fuel contamination.

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 pump modules, pump inserts, or assemblies integrated with a level sensor, check the available parts in the Mercedes fuel pumps and level sensors category.

Technical support and additional materials

When working with fuel system components and related sensors or control modules, it is worth using verified sources of information regarding selection by identification numbers, hardware and software compatibility, and correct installation procedures. Practical tips in this regard can be found in our guide: Used automotive electronics on board – why choose second-hand ECU modules and sensors?.