Mercedes W203 W204 W211 Fuel Regeneration Pump Purge Solenoid Valve A0004703693

Description

Mercedes W203 W204 W211 Fuel Regeneration Pump Purge Solenoid Valve is a fuel system component designed for gasoline-powered vehicles, responsible for the controlled discharge and routing of fuel vapors. Thanks to its precise construction, it ensures stable operation of the fuel supply system and helps maintain correct exhaust emission parameters. This is a practical solution for users who want to restore the proper functioning of the fuel system in their Mercedes and avoid issues with uneven engine operation or diagnostic errors.

Specifications and technical data

• SKU: A0004703693
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0004703693
• Substitutable numbers: A0004703693, A 000 470 36 93
• Fuel type: Petrol
• Category: Fuel Pumps & Sending Units

Function of the fuel vapor purge valve

The fuel vapor purge valve operates in a circuit between the fuel tank and the engine intake system, controlling the flow of vapors depending on the operating conditions of the power unit. A properly functioning component allows for:

• stabilization of the air-fuel mixture composition in a gasoline engine,
• reduction of fuel losses resulting from uncontrolled vapor evaporation,
• reduction of the risk of engine control unit errors related to the fuel system,
• maintenance of compliance with fuel vapor emission requirements.

For Mercedes C-Class and E-Class models from the W203, W204, and W211 families, a functional valve of this type is essential for smooth engine operation, especially at idle and partial loads.

Purpose and compatibility

The presented component has been designed for Mercedes vehicles with gasoline engines, where the fuel system uses controlled vapor discharge to the intake manifold. Using a dedicated valve for specific body generations allows for maintaining:

• proper fit to the factory fuel and vacuum installation,
• compliance with the engine control unit’s operating characteristics,
• trouble-free installation in the location provided by the manufacturer.

Selecting parts according to manufacturer markings and fuel system parameters minimizes the risk of compatibility issues and eliminates the need for installation modifications.

Technical characteristics and role in the fuel system

As an element from the Fuel pumps and level sensors group, the valve works with other components of the supply system, such as the fuel pump, fuel lines, or level sensors. In practice, its proper operation translates into:

• more predictable engine response to load changes,
• reduction of fuel odor around the vehicle,
• stable operating conditions for sensors and fuel system control elements.

In gasoline-powered cars, it is particularly important that the vapor circuit is sealed and properly controlled – leaks or a blocked valve can cause starting difficulties, fluctuating idle speed, or increased fuel consumption.

Condition, service application, and benefits of installation

The offered valve is a used component, which makes it an attractive cost-effective alternative compared to new parts, while maintaining the functionality required for daily operation. It works well both for typical replacement of a worn-out element and for broader service work within the fuel system, e.g., when diagnosing problems with tank venting or incorrect mixture composition.

A properly selected and functional valve helps reduce the risk of recurring faults and also facilitates passing periodic technical inspections, where increasing attention is paid to the tightness and correct operation of fuel-related systems.

Technical support and additional materials

To better understand the relationships between the fuel vapor purge valve and other components of the supply system, it is worth consulting the guide material describing the construction and diagnostics of the fuel system – you can find it in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. It allows you to organize knowledge about symptoms of wear, methods of selecting parts by manufacturer markings, and principles of proper operation.

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 fuel pumps, supply modules, or level sensors, check the available parts in the Mercedes fuel pumps and level sensors category.