Mercedes C205 OM654 Diesel Engine Radiator Bleed Line Pipe Hose Tube A2055014801

Mercedes C205 OM654 Diesel Engine Radiator Bleed Line Pipe Hose Tube is an original cooling system component, designed for precise air evacuation from the coolant circuit in OM654 diesel engines. Thanks to its tailored geometry and factory specifications, it ensures stable system operation, supporting safe engine operating temperatures and extending the service life of other cooling components. This is a practical service solution for users who expect a proven, original Mercedes part in an affordable, used condition.

Specifications and technical data

• SKU: A2055014801
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055014801
• Substitutable numbers: A2055014801, A 205 501 48 01
• Fuel type: Diesel
• Category: Coolant Hoses

Function in the diesel engine cooling system

The bleed line in the cooling system plays a key role in stabilizing coolant flow in diesel engines. In the case of the OM654 unit, the use of a dedicated bleed pipe allows for:

• efficient removal of air bubbles from the cooling circuit,
• maintaining uniform pressure in the hoses and radiator,
• reducing the risk of localized overheating in the cylinder head and engine block area,
• stable cooperation with the thermostat, water pump, and the radiator itself.

As a result, the cooling system in the diesel engine operates under more predictable conditions, which helps maintain the proper operating temperature and improves the refinement of the powertrain.

Dedicated to Mercedes C‑Class C205 with OM654 engine

The offered bleed line has been designed specifically for the C205 body with the OM654 diesel engine, which means factory-perfect fitment for the cooling system layout in the engine bay. Properly selected connector diameters and pipe shape facilitate installation in the original brackets and guides, without the need for modifications or the use of adapters.

Such fitment translates into:

• a secure connection to the radiator and other hoses,
• reduced risk of leaks at the joints,
• preservation of the factory coolant flow path.

Benefits of using an original used hose

Choosing a used, original radiator bleed line is a reasonable compromise between cost and quality. A component sourced from dismantling retains the manufacturer's factory specifications, which promotes proper fit and compatibility with other cooling system components. In practice, this means:

• maintaining the original flow characteristics in the cooling system,
• no installation problems resulting from dimensional differences,
• the possibility of economical repair or service of the cooling system in a diesel engine.

For many users of the Mercedes C‑Class C205 with the OM654 unit, this is a way to maintain high-quality service while reducing operating costs.

Application in real-world operating conditions

In diesel engines, especially those used in city traffic and on long routes, the cooling system is exposed to variable thermal loads. A functional radiator bleed line helps reduce phenomena such as air locks in the circuit or temperature fluctuations under high load. This is especially important in summer, when high ambient temperatures place additional strain on the radiator and fans.

If you want to better understand how summer conditions affect the operation of the radiator and the entire cooling system, and when it is worth reaching for used components, check out our guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, where we discuss the practical aspects of operation and service.

Expanding the cooling system in your Mercedes

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 lines, flexible hoses, or coolant return pipes, check out the available parts in the category Mercedes cooling system lines and hoses.

For drivers considering different service strategies – from factory parts, through replacements, to used components – our comparative guide Original, replacement, or used – which car parts are the most cost-effective? may also be helpful, where we discuss the differences in cost-effectiveness and component fitment in the context of daily operation.