Mercedes W205 M264 Petrol Fuel Pump Injection High Pressure A2640700000

Mercedes W205 M264 Petrol Fuel Pump Injection High Pressure is a component from the High-pressure fuel pumps category, designed for petrol engines of this Mercedes generation. This used, original high-pressure pump ensures proper fuel supply to the engine, stable injection performance, and correct dynamics while maintaining the factory parameters of the fuel system.

Specifications and technical data

• SKU: A2640700000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2640700000
• Substitutable numbers: A2640700000, A 264 070 00 00, 0261520453, 0 261 520 453
• Fuel type: Petrol
• Category: High Pressure Fuel Pumps

Purpose and role in the fuel system

The presented high-pressure pump is used in M264 series petrol engines installed in the W205 generation Mercedes C-Class. It is responsible for increasing fuel pressure from a low level (tank pump) to the values required by the precise injection system, which translates into correct fuel dosing, engine smoothness, and the maintenance of proper performance.

By using an original component, compatibility with the factory engine control unit characteristics, injection maps, and other fuel system elements is maintained. This is particularly important for modern direct-injection petrol units, where stable fuel pressure is crucial for the durability of injectors and catalytic converters.

Benefits of using an original high-pressure pump

Using a used, original high-pressure pump instead of a worn or damaged component allows for the restoration of correct engine operating parameters without the need for an expensive purchase of a new part. Compared to aftermarket replacements, the original component provides:

• factory fitment for the M264 unit and fuel system,
• proper cooperation with pressure sensors and the engine control unit,
• stable operating pressure across the full load range,
• reduced risk of starting issues, jerking, or power loss.

For the user, this means more predictable operation, better throttle response, and fuel consumption maintained at levels close to factory values.

Technical characteristics and fuel

The pump belongs to the High-pressure fuel pumps group and is designed for operation in systems powered by petrol. The design is adapted to the high operating pressures typical for direct petrol injection, taking into account requirements regarding tightness, temperature resistance, and chemical compatibility with modern fuel blends.

Selecting the pump according to the OEM number and interchangeable numbers allows for precise matching to the specific engine configuration and vehicle model year, which minimizes the risk of installation problems and incompatibility with auxiliary equipment.

Condition, installation, and service application

The offered pump is a used item, which represents a reasonable compromise between repair costs and maintaining original manufacturing quality. This type of part is suitable both for a typical replacement of a worn component and for major service work related to the fuel system, such as diagnosing pressure drops or resolving issues with starting a warm engine.

During installation, it is recommended to use new seals and follow the manufacturer's procedures regarding tightening torques and system bleeding. A correctly installed pump helps restore stable injection performance and reduces the risk of secondary faults within the fuel system.

Technical support and selection by numbers

To correctly select the pump for a specific Mercedes vehicle, it is worth using the OEM number and reference numbers assigned to this engine unit. In case of doubt, comparing the markings with the removed part or verifying via the VIN number in the manufacturer's catalog will be helpful.

For users who want to deepen their knowledge about the diagnostics and operation of the fuel system, we recommend the article: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which discusses operating principles, component selection by numbers, and typical symptoms of wear.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional pumps, supply lines, or pressure control elements, check the available parts in the Mercedes high-pressure fuel pumps category.