Mercedes W211 Coolant Water Circulation Pump A2118350264

Mercedes W211 Coolant Water Circulation Pump is a cooling system component designed to support fluid circulation in the rear part of the vehicle. Thanks to its precise fit to the Mercedes design, it ensures stable system operating parameters and helps maintain proper thermal conditions. This solution is particularly beneficial under higher system loads, where reliable coolant circulation and compatibility with the factory installation are essential.

Specifications and technical data

• SKU: A2118350264
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2118350264
• Substitutable numbers: A2118350264, A 2118350264, A 211 835 02 64, A2118350364, A 211 835 03 64
• Location on the vehicle: Rear
• Category: Water Pumps

Purpose and function of the auxiliary water pump

The auxiliary water pump in the Mercedes W211 is responsible for supporting the flow of coolant in the rear zone of the vehicle. Its placement in the rear area allows for more efficient supply of coolant to components requiring a stable temperature, which translates into the uniform operation of the entire system.

Such a design solution is particularly important in high-end vehicles, where the cooling system supports more components and comfort zones. The auxiliary water pump helps reduce local overheating of components and supports the maintenance of predictable operating conditions in various usage modes.

Compatibility and fit for Mercedes

The offered pump belongs to the Water pumps category and has been developed specifically for Mercedes vehicles. This means maintaining factory connection geometry, appropriate flow parameters, and compatibility with the original mounting in the rear part of the vehicle.

The element has a dedicated OEM part number and interchangeable numbers, which facilitates clear identification and selection of the correct variant for a specific car configuration. Thanks to this, you can safely plan the replacement based on service documentation or data from catalog systems.

Installation and operational characteristics

The placement of the pump in the rear part of the vehicle requires maintaining the correct installation orientation and proper routing of coolant hoses. In practice, this means paying attention to:

• correct connection of the fluid inlet and outlet ports,
• stable mounting in factory attachment points,
• checking the tightness of connections after the first system start-up,
• proper bleeding of the cooling system after installation.

A properly selected and installed auxiliary water pump supports even temperature distribution in the system, which promotes a longer service life of other components and stable vehicle operation in both urban and extra-urban conditions.

Condition of the element and benefits of choosing a used part

The presented auxiliary water pump is an aftermarket element, which allows for optimizing service costs while maintaining the original design intended for Mercedes. Choosing a used OEM component is often preferred by users who want to maintain consistency with the factory cooling system design, avoiding random replacements with uncertain parameters.

Before installation, it is recommended to perform a standard technical condition verification, check for leaks, and ensure the impeller works correctly after power is applied to ensure trouble-free operation after installation in the vehicle.

Technical support and selection by numbers

Due to the importance of correctly selecting fluid and fuel system components, it is worth using educational materials describing the principles of identifying parts by OEM numbers and diagnostic methods. A detailed discussion of issues related to the selection and operation of pumps can be found in the article: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, which organizes knowledge about pump operation, service procedures, and ways to reduce the risk of failure.

If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and need other elements from the same group, such as auxiliary pumps, fluid circulation support modules, or auxiliary elements, check the available parts in the Mercedes Water pumps category.