Mercedes W177 Heater Radiator Coolant Pipe Hose A2602004400

Mercedes W177 Heater Radiator Coolant Pipe Hose is an original cooling system component, designed specifically for precise fluid routing in modern Mercedes engines. Thanks to its factory geometry and perfect fit for the W177 body mounts, the hose ensures stable coolant flow and supports the maintenance of optimal engine operating temperatures. It is a practical solution for users who want to maintain the structural integrity of the cooling system and avoid leakage issues.

Specifications and technical data

• SKU: A2602004400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2602004400
• Substitutable numbers: A2602004400, A 260 200 44 00
• Category: Coolant Hoses

Function in the cooling system

The Mercedes W177 Heater Radiator Coolant Pipe Hose is responsible for the controlled routing of coolant between system components, such as the radiator, engine block, or other auxiliary parts. Its properly shaped cross-section and routing path minimize the risk of kinks, flow restrictions, and localized overheating.

Using an original hose in this section of the cooling system allows for the preservation of factory operating parameters, which translates into stable engine temperature, reduced load on other components, and more predictable engine behavior under various operating conditions.

Construction and fit for Mercedes W177

The hose belongs to the Cooling system pipes and hoses group, meaning it has been designed for resistance to temperature, pressure, and the operating fluids used in Mercedes engines. The shape and support points are adapted to the architecture of the W177 engine bay, ensuring that installation is orderly and does not require modification of other components.

Its original Mercedes origin promotes the maintenance of proper hose rigidity, adequate flexibility in areas requiring vibration compensation, and compatibility with factory clamps and connectors. This is particularly important when servicing modern units where installation space is limited and assembly tolerances are strictly defined.

Benefits of using an original hose

Using this hose in the cooling system provides a number of practical service and operational benefits:

• Stable coolant flow – maintaining the factory diameter and cross-sectional geometry reduces the risk of cavitation and localized pressure drops.
• Better connection tightness – the fit to original ports and connectors reduces the probability of leaks at critical points in the system.
• Consistency with vehicle design – the hose does not interfere with other components in the engine bay, which facilitates subsequent service work.
• Trouble-free diagnostics – maintaining the original hose routing makes it easier for mechanics to identify the sources of potential cooling system faults.

Component condition and service application

The offered hose comes from dismantling and is a used part, which allows for economical repair while maintaining the manufacturer's original specifications. This type of solution is often chosen when servicing vehicles that are a few years old, where it is crucial to combine reasonable costs with maintaining factory fitment and cooling system characteristics.

Before installation, it is recommended to perform a standard inspection of the condition of the working surfaces, ports, and areas where hose clamps are applied, as well as to replace the coolant in accordance with the vehicle manufacturer's service procedures. This ensures that the cooling system can operate in a predictable and stable manner in the long term.

Technical support and related content

To better understand the impact of pipes and hoses on engine durability and the symptoms of cooling system malfunction, it is worth reading the guide: Engine cooling system – overheating, repair, and used radiators. The article discusses practical aspects of overheating diagnostics and the importance of proper coolant flow.

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 pipes, return hoses, or sections connecting to the radiator, check the available parts in the Mercedes cooling system pipes and hoses category.

When making a decision about choosing parts from dismantling, the material describing the differences between remanufactured and used parts, available here, may also be helpful: Remanufactured or used original – which part to choose for repair?. This makes it easier to select a service strategy tailored to a specific vehicle and budget.