Mercedes C205 OM654 Reservoir Coolant Filling Hose Pipe Line Tube A2055014601

Mercedes C205 OM654 Reservoir Coolant Filling Hose Pipe Line Tube is an original component from the Cooling system hoses and pipes group, designed for precise delivery of coolant to the expansion tank. The design, tailored to the OM654 engine architecture, ensures stable coolant flow, proper venting, and safe operation of the entire system under typical operating conditions of a diesel vehicle.

Specifications and technical data

• SKU: A2055014601
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055014601
• Substitutable numbers: A2055014601, A 205 501 46 01
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the cooling system

The described hose is a component connecting the coolant circuit to the expansion tank area, which is crucial for maintaining the correct pressure and fluid level in a diesel engine. The properly shaped geometry of the hose minimizes the risk of kinks, local constrictions, and air pockets, which promotes stable operating temperature of the power unit and reduces the risk of overheating.

Being dedicated to a diesel engine translates into resistance to temperature ranges and vibrations typical for diesel units, as well as compatibility with the characteristic routing of harnesses and accessories in the engine bay. Thanks to this, the hose maintains proper flow and tightness during long-term operation.

Advantages of using an original cooling hose

Using an original hose in the cooling system brings a number of practical benefits:

• secure fit to mounts and connectors in the engine bay,
• preservation of the factory cooling line routing,
• reduction of stress on joints and clamps,
• easier installation and removal during service.

Thanks to this, replacement is predictable, and the risk of leaks after installation is reduced. This is particularly important in modern diesel units, where stable coolant circulation affects not only engine durability but also the proper operation of exhaust emission systems and interior thermal comfort.

Performance characteristics of the used component

The hose comes from dismantling, which means it is a used part, but one that retains the functionality required for further operation. This type of part is a good choice in situations where the priority is rational repair cost while maintaining original geometry and compatibility with the factory cooling system. A used hose allows for restoring the original cooling line routing without the need to use replacements with uncertain fitment.

Choosing an element from this group is particularly justified for post-accident repairs, replacing damaged sections of the cooling installation, or during gradual renovation of diesel engine accessories, where compliance with factory specifications matters.

Integration with the cooling system and diagnostics

The hose works with other cooling system components, such as the radiator, water pump, thermostat, or fans. A properly selected and installed component facilitates maintaining the tightness of the entire circuit and correct venting after fluid replacement. In the case of diagnosing engine overheating or coolant loss, it is worth paying attention to the condition of the hoses, their flexibility, any signs of abrasion, and the correctness of routing relative to other subassemblies.

To better understand the impact of ambient temperature on cooling system efficiency and the importance of functional components, it is worth checking our guide: Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. You will find practical tips there regarding the operation and maintenance of cooling systems in various conditions.

Expanding Mercedes cooling system service

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 return line sections, check the available parts in the Mercedes cooling system hoses and pipes category.

For larger service projects, also involving the power unit or transmission, our expert material on the cost-effectiveness of using components from the secondary market may be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths. It will allow you to better plan your budget and the scope of work while maintaining an appropriate level of vehicle reliability.