Mercedes C205 OM654 Diesel Engine Radiator Bleed Line Pipe Hose Tube A2055014401

The Mercedes C205 OM654 Diesel Engine Radiator Bleed Line Pipe Hose Tube is an original cooling system component designed for the precise removal of air from the coolant circuit. Thanks to its factory-spec geometry and perfect fit for the OM654 unit, it ensures stable engine thermal conditions and supports the trouble-free operation of the entire system.

Specifications and technical data

• SKU: A2055014401
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055014401
• Substitutable numbers: A2055014401, A 205 501 44 01
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the cooling system

This hose belongs to the Cooling System Pipes and Hoses category and serves as a venting component for the coolant circuit in a diesel engine. Its task is to provide controlled removal of air bubbles from the radiator and water channels, which reduces the risk of localized overheating, cavitation, and a drop in cooling efficiency.

In diesel engines such as the OM654, a stable operating temperature is crucial for the durability of the unit, the proper operation of auxiliary equipment, and the maintenance of exhaust emission parameters. A properly selected bleed hose helps maintain an even flow of coolant and supports the correct operation of the thermostat, water pump, and radiator.

Construction and fit for the Mercedes C205 with OM654 engine

The hose has been designed specifically for the engine bay architecture of the Mercedes C-Class C205 with the OM654 unit, which translates into:

• precise routing along factory mounting points,
• an internal diameter correctly matched for coolant flow,
• a shape that minimizes the risk of kinks and flow restriction.

The original origin from the Mercedes brand means compliance with factory dimensional and material tolerances, which facilitates installation and reduces the need for additional modifications.

Performance parameters and benefits of use

The bleed hose operates in an environment of high temperatures and variable pressures, typical for engines with a Diesel fuel type (system information: ). Using an original component instead of a worn or leaking section of the cooling installation allows you to:

• reduce the risk of engine overheating in city and highway conditions,
• maintain a stable coolant level without uncontrolled losses,
• reduce the possibility of air pockets in the system after service or radiator replacement.

For users who operate their vehicle intensively (high mileage, frequent cold starts), a functional bleed hose is an essential element of preventative maintenance against costly engine repairs.

Condition, origin, and system identification

The offered item is marked in our system asand comes from dismantling, which in practice means it is a used component (condition information: ). For Mercedes vehicles, it is important to check compatibility with the OEM part number (in the system: ) and any interchangeable numbers (), so it is worth comparing this data with your car's specifications before purchasing.

Choosing an original hose from the secondary market is a reasonable compromise between cost and maintaining the factory characteristics of the cooling system, especially in modern diesel units.

Operation, installation, and additional technical materials

During the installation of the bleed hose, it is recommended to:

• check the condition of other pipes and hoses around the radiator,
• verify the tightness of connections after the engine has warmed up for the first time,
• properly bleed the system according to the service procedure.

To better understand the impact of an efficient coolant circuit on engine durability, it is worth reading the guide on our blog: Engine cooling system – overheating, repair, and used radiators. The article discusses practical aspects of diagnostics and service for cooling systems in modern cars.

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 return lines, supply hoses, or flexible bleed sections, check the available parts in the Mercedes Cooling System Pipes and Hoses category.