Mercedes W447 Coolant Water Hose Pipe Line Radiator Cooler OM622 A4478322800

Mercedes W447 Fuel Hose Line Pipe OM622 is a component designed for diesel systems, ensuring stable fuel delivery in a Diesel engine. Thanks to its precise fit for the specific engine unit and its belonging to the Cooling System Hoses and Pipes group, this part helps maintain correct operating parameters for the fuel and cooling systems. A used OEM component is a sensible choice for users seeking a technically proven solution at an attractive price.

Specifications and technical data

• SKU: A4478322800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4478322800
• Substitutable numbers: A4478322800, A 447 832 28 00
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and Technical Function

The offered fuel hose is dedicated to Mercedes W447 vehicles equipped with the OM622 diesel engine. Its function is to safely route fuel within the engine unit, maintaining proper sealing and resistance to temperature and vibrations present in the engine bay. As a component from the Cooling System Hoses and Pipes group, it interacts with the engine's thermal environment, which is important for the stable operation of the entire system.

Benefits of Using an Original Fuel Line

Using an original fuel line in a Diesel engine translates to predictable fuel system behavior and reduced risk of leaks. In practice, this means:

• better compatibility with the fuel and cooling system in Mercedes W447,
• maintaining the original routing geometry of the lines,
• stable operating conditions in high ambient temperatures,
• reduced risk of incorrect installation compared to universal aftermarket parts.

For diesel engines where fuel metering precision is crucial, a correctly selected fuel line is an important element influencing the engine's running smoothness and durability.

Characteristics of the Used Component

The offered fuel line is a used part, allowing for economical vehicle repair while maintaining the original manufacturer's specifications. Such components are often chosen when compliance with the factory design and the possibility of quick replacement without installation modifications are important. A used OEM part is a particularly beneficial solution for servicing vehicles used intensively, where technical efficiency and cost control are priorities.

Significance for the Cooling System and Diesel Engine Operation

Although the hose is directly responsible for fuel transport, its operation takes place in close proximity to components responsible for heat dissipation. Proper routing of the hose within the engine bay affects:

• resistance to overheating in hot summer conditions,
• stability of fuel parameters supplied to the engine,
• reduction of local thermal stress risk.

To better understand how ambient temperature affects the operation of the entire system, it is worth reading the guide describing the relationship between cooling and operation in high temperatures – details can be found in the article Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings.

Additional Information and Technical Materials

In the case of diesel engines, any irregularities in the fuel supply area can manifest as a loss of power, uneven running, or starting problems. If you want to better understand the connections between fuel lines and injector operation, the guide on diagnosing diesel units may be helpful: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails.

If you are planning comprehensive maintenance of the thermal and fuel system in your Mercedes and also need other components from the group of hoses cooperating with the cooling system, check the available parts in the category Mercedes Cooling System Hoses and Pipes.