Coolant Hose Mercedes W177 OM608 Diesel Expansion Tank To Radiator A1775014800

Coolant Hose Mercedes W177 OM608 Diesel Expansion Tank To Radiator connecting the expansion tank to the radiator is a cooling system component designed specifically for diesel units. It is responsible for the stable flow of coolant between key components, which supports safe operating temperatures for the diesel engine and reduces the risk of overheating. This used, original hose is a sensible choice for cooling system maintenance in modern Mercedes compact class models.

Specifications and technical data

• SKU: A1775014800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1775014800
• Substitutable numbers: A1775014800, A 177 501 48 00
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the cooling system

This hose has been developed as a connecting element between the expansion tank and the radiator in Mercedes W177 series models equipped with the OM608 diesel engine. Its task is to ensure controlled coolant flow, which enables:

• maintaining a stable operating temperature for the diesel unit,
• proper venting of the cooling system,
• efficient fluid circulation between the tank and the radiator,
• reduction of thermal loads on diesel engine components.

Thanks to its tailored geometry and factory-spec ends, the hose works with original connectors, which facilitates installation and reduces the risk of leaks.

Benefits of using an original hose

Using an original hose in the cooling system has a direct impact on engine reliability. Compared to aftermarket replacements, a component originating from the same production line as the vehicle's factory equipment ensures:

• precise fitment for the cooling system in the Mercedes W177 with the OM608 engine,
• preservation of the factory inner and outer hose diameter,
• appropriate material flexibility under typical diesel thermal loads,
• compatibility with original clamps and mounts.

Such a solution helps maintain stable cooling system operating parameters, which translates into engine longevity and a lower risk of failures related to overheating.

Condition, installation, and service application

The hose comes from the Cooling system hoses and pipes group and is a used component, which allows for optimizing repair costs while maintaining original specifications. It is particularly useful in situations where:

• the existing hose shows signs of wear, cracks, or brittleness,
• replacement of the component is necessary after a collision or engine bay intervention,
• you are performing cooling system maintenance on a diesel engine and want to restore the factory configuration.

Thanks to its factory profile, the hose can be installed in a way that replicates the original routing in the engine bay, which facilitates service and reduces the risk of rubbing against other components.

Importance for diesel engine durability

Diesel engines are particularly sensitive to incorrect operating temperatures. A functional hose between the expansion tank and the radiator helps maintain:

• proper pressure in the cooling system,
• even distribution of fluid in the circuit,
• stable operating conditions under loads characteristic of diesel units.

To better understand the impact of the cooling system on engine longevity, it is worth reading an article discussing common overheating problems and radiator maintenance: Engine cooling system – overheating, repair, and used radiators.

Expanding the cooling system in a Mercedes

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