Mercedes W205 Engine Electric Water Coolant Pump Thermostat M264 A2642000100

The Mercedes W205 Water Pump Thermostat Radiator M264 is an original cooling system component designed for gasoline engines, ensuring stable operating conditions for the powertrain. The integration of the water pump with the thermostat allows for precise management of coolant temperature, which translates to efficient engine operation and reduced risk of overheating. This solution is dedicated to users expecting factory fitment and proper cooperation with the cooling system in Mercedes models with the M264 unit.

Specifications and technical data

• SKU: A2642000100-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2642000100
• Substitutable numbers: A2642000100, A 264 200 01 00
• Fuel type: Petrol
• Part type: Engine Water Pump
• Category: Water Pumps

Function and Application in the Cooling System

The water pump integrated with the thermostat is responsible for the forced circulation of coolant between the engine block, cylinder head, and radiator, as well as for controlling the opening of the circuit to the radiator. For M264 gasoline units in the Mercedes W205, the correct operation of this component is crucial for:

• maintaining stable engine operating temperature under various load conditions,
• reducing local overheating and thermal stress within the block and cylinder head,
• ensuring proper cooperation with engine control and exhaust emission systems,
• maintaining the thermal efficiency of the powertrain.

Thanks to the design intended by the vehicle manufacturer, this component works with the factory control and operating characteristics of the gasoline engine, which promotes stable operation over the long term.

Benefits of Using an Original Mercedes Water Pump

Using a component from the Water Pumps group dedicated to a specific powertrain allows for the preservation of parameters intended by the vehicle manufacturer. In practice, this means:

• correct coolant circulation pressure and flow rate across the entire RPM range,
• appropriately selected thermostat opening characteristics in relation to engine control maps,
• maintaining compatibility with factory connections, hoses, and mounting points,
• reduced risk of leaks resulting from ill-fitting aftermarket parts.

For gasoline engines, where operating temperature is closely linked to emissions and fuel consumption, a properly selected water pump with a thermostat helps maintain stable operating parameters and proper cooperation with other powertrain components.

Characteristics of a Used Component

The offered component is a salvaged part and is classified as a used original part. This type of part is an attractive solution for users seeking a factory component at a more favorable price than a new equivalent, while retaining the design intended for the specific engine. In practice, this allows for:

• preserving the original geometry of the impeller and flow channels,
• maintaining compatibility with factory mounting points in the M264 unit,
• reducing repair costs while utilizing OEM parts.

Before installation, standard verification of tightness and connection condition is recommended, in accordance with service procedures used in Mercedes vehicles with gasoline engines.

Selection by Numbers and Integration with the Fuel System

The selection of this water pump with thermostat for a specific Mercedes W205 should be based on catalog data, manufacturer part numbers, and gasoline engine parameters. If you have doubts about compatibility with a particular powertrain version, it is advisable to consult technical materials describing methods for identifying components by factory numbers and their relationship with other vehicle systems. A detailed discussion of component selection methods based on manufacturer markings, as well as their impact on drive performance, can be found in the article Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair, which organizes issues related to the diagnosis and replacement of key components.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional pumps, housings, or fluid flow control elements, check the available parts in the Mercedes Water Pumps category.

Summary

The Mercedes W205 Water Pump Thermostat Radiator M264 is a solution designed for gasoline engines that combines the function of forced coolant circulation with the control of the radiator circuit opening temperature. Using an original, used component allows for the preservation of factory cooling system operating parameters while reducing service costs. It is a practical choice for users who expect proper cooperation with the M264 unit and predictable vehicle behavior in daily operation.