Mercedes-Benz W169 W245 180CDI 200CDI Water Coolant Pipe Hose A6402032682

Mercedes-Benz W169 W245 180CDI 200CDI Water Coolant Pipe Hose is a component from the Cooling system pipes and hoses group, designed for use in oil vapor extraction and fluid flow systems in Mercedes engines. This used OEM part ensures a factory-fit, stable mounting, and predictable performance under operating conditions typical for A and B series power units.

Specifications and technical data

• SKU: A6402032682
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6402032682
• Substitutable numbers: A6402032682, A 640 203 26 82
• Category: Coolant Hoses

Purpose and technical function

The pipe – breather water hose in A and B class models is responsible for the controlled flow of the working medium between engine system components, working in conjunction with the crankcase ventilation system. A properly selected hose reduces the risk of leaks, stabilizes the engine's operating conditions, and supports the maintenance of proper temperature and circuit cleanliness.

In practice, this means:

• maintaining the tightness of connections in the breather and cooling system area,
• reducing uncontrolled leaks and air intake,
• maintaining correct engine operating parameters under various load conditions.

Compatibility and fit for Mercedes A/B

The offered hose is a component dedicated for use in Mercedes vehicles of the A and B series, generations W169 and W245, which translates into correct geometry, connection diameters, and mounting points. As a result, installation is straightforward, without the need for modifications or makeshift workarounds.

Factory fit for the specific body platform:

• facilitates service and reduces replacement time,
• minimizes the risk of material stress resulting from improper positioning,
• ensures compliance with the original routing of hoses in the engine compartment.

Performance characteristics of the used component

As an aftermarket part, the breather water hose offers a favorable compromise between cost and functionality. The used component retains the original design and operating parameters specified by the manufacturer, which is particularly important in systems where resistance to temperature, vibration, and contact with oil vapors is critical.

Choosing this solution allows you to:

• reduce repair costs while maintaining factory specifications,
• maintain the integrity of the cooling and breather system without using replacements of uncertain origin,
• ensure predictable system behavior in the long term.

Technical support and knowledge about the cooling system

For a full understanding of the role of hoses in the cooling system and the impact of temperature on component durability, it is worth consulting specialized materials. In our guide, we discuss how high summer temperatures affect the entire engine cooling system and how to rationally use the secondary market when choosing used components, such as radiators or fans – details can be found in the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.

Economics and the ecological aspect of used hoses

Using pre-owned components in the area of pipes and hoses is not only a cost-saving measure but also a real reduction in automotive waste. By choosing such a component, you support the reuse of functional parts, which reduces the demand for new raw materials and the production of energy-intensive subassemblies.

If you want to learn more about the benefits of responsible use of the secondary market and automotive recycling, check out the guide Eco-driving: discover the benefits of used car parts, where we discuss practical examples of using pre-owned components in daily car operation.

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 additional pipes, hoses, or connectors, check the available parts in the category Mercedes cooling system pipes and hoses.