Water Hose Mercedes W177 W247 Heat Exchanger Coolant Return Pipe A2478306700

Water Hose Mercedes W177 W247 Heat Exchanger Coolant Return Pipe is an original cooling system component from the Lines, hoses and pipes group, designed for use in Mercedes vehicles. Using an OEM part allows you to maintain factory coolant flow characteristics, which translates into stable engine operation and predictable behavior of the entire system.

Specifications and technical data

• SKU: A2478306700
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2478306700
• Substitutable numbers: A2478306700, A 247 830 67 00
• Category: Hoses, Lines & Pipes

Technical specifications and intended use

The presented water hose is a cooling system component responsible for directing fluid between individual engine components and accessories. The design, tailored to the specific architecture of the engine compartment in W177 and W247 models, ensures:

• stable coolant flow routing as intended by the manufacturer,
• proper positioning relative to other components,
• reduced risk of collision with moving parts and high-temperature sources.

Thanks to the preservation of the original geometry and connection diameters, the hose works with factory connectors and clamps, which facilitates installation and reduces the need for additional modifications.

Benefits of using an original water hose

Using an original water hose in a Mercedes cooling system allows you to maintain operating parameters close to factory standards. In practice, this means:

• more predictable engine operating temperature behavior,
• reduced risk of leaks resulting from shape or diameter mismatch,
• easier diagnostics and service in the future, thanks to compliance with manufacturer documentation.

A used OEM part is a reasonable compromise between cost and quality – you retain the factory fit and design while optimizing your repair budget.

Component condition and installation aspects

The offered water hose is in used condition, which in practice means it comes from disassembly and has been verified for suitability for further use. Such components are standardly subjected to visual inspection, checking of material flexibility, and connection sockets before reinstallation.

During installation, it is recommended to:

• thoroughly clean the connectors and contact surfaces,
• verify the condition of the clamps and replace them if necessary,
• bleed the cooling system after refilling with fresh fluid.

This approach allows you to fully utilize the potential of the part and reduce the risk of subsequent leaks.

Selecting lines, hoses and pipes for Mercedes

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 flexible coolant hoses, rigid guide pipes, or additional return branches, check the available parts in the Mercedes lines, hoses and pipes category.

When selecting hoses, it is worth paying attention to compatibility with the specific body generation and engine type. Relying on original Mercedes solutions minimizes the risk of installation problems and ensures the consistency of the entire cooling system.

Why consider used OEM components

In the case of technical systems such as engine cooling, used OEM components often offer a better fit than cheap replacements with uncertain specifications. This applies to both hoses and components working in other vehicle subsystems. If you want to learn more about the cost-effectiveness of using recycled parts in critical vehicle systems, check out the article Brake calipers under the microscope: How to effectively reduce the cost of brake system repairs, which discusses a practical approach to choosing original, used components.

By choosing an original water hose for your Mercedes, you gain a technically matched element that supports the stable operation of the cooling system and facilitates further vehicle service.