Mercedes-Benz C-Class W203 CDI Fuel Pump Delivery Unit Diesel A2034703694

Mercedes-Benz C-Class W203 CDI Fuel Pump Delivery Unit Diesel is a precision fuel system component designed for CDI diesel engines. It ensures stable diesel fuel delivery to the injection system, which translates into smooth engine operation and proper interaction with the control electronics. By maintaining factory specifications, this solution is particularly beneficial for professional repairs and servicing of W203 generation C-Class models.

Specifications and technical data

• SKU: A2034703694
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2034703694
• Substitutable numbers: A2034703694, A 203 470 36 94, EM
• Fuel type: Diesel
• Category: Fuel Pumps & Sending Units

Purpose and function in the fuel system

The described fuel pump belongs to the Fuel pumps and level sensors category, responsible for delivering the correct amount of diesel fuel to the injection system in a diesel engine. In Mercedes C-Class W203 vehicles with CDI units, this component works with the common rail system, stabilizing supply pressure and enabling correct fuel metering by the injectors.

A properly selected fuel pump in a diesel engine:

• ensures even supply to the fuel rail under various loads,
• reduces the risk of power drops and starting problems,
• supports the correct operation of the engine control unit, which adjusts the injection dose based on parameters from the fuel system.

Compatibility and part number identification

The component has been designed specifically for use in Mercedes-Benz C-Class W203 CDI diesel systems, maintaining factory flow parameters and operating characteristics. As a result, it is a suitable choice when replacing a damaged pump in vehicles equipped with this series of diesel engines.

Selecting the part is facilitated by the presence of a dedicated OEM number and associated interchangeable numbers, which allows for precise verification of compatibility with a specific engine version and model year. In practice, this means it can be safely used to replace a worn-out component without the need for fuel system modifications.

Performance characteristics and installation benefits

The fuel pump version intended for the diesel Mercedes C-Class W203 has been constructed to work with the factory fuel system and vehicle electronics. Maintaining the original geometry and connections allows for installation into the existing system without interfering with the electrical wiring or fuel lines.

Key benefits of using this model include:

• maintaining factory fuel system operating parameters,
• proper cooperation with fuel level sensors and the engine control unit,
• suitability for professional repairs where compliance with the manufacturer's service documentation is essential.

Component condition and service application

The offered fuel pump is a used part, making it an attractive solution when seeking an economical yet technically matched solution for repairing the fuel system in a Mercedes C-Class W203 CDI. Such components are frequently chosen by workshops specializing in servicing vehicles with diesel engines, where both technical compliance and repair cost optimization are important.

For users and service centers looking to deepen their knowledge on selecting used control and measurement system components, a guide dedicated to vehicle electronics and sensors may be helpful. Detailed tips regarding compatibility verification, markings, and installation procedures can be found in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Expanding the fuel system in a Mercedes

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other components from the same group, such as additional pumps, supply modules, or assemblies integrated with a fuel level sensor, check the available parts in the Mercedes fuel pumps and level sensors category.