Mercedes W205 Water Coolant Return Pipe Hose Line A2055018982

Mercedes W205 Water Coolant Return Pipe Hose Line is an original cooling system component designed for the precise return of coolant to the circulation loop. Thanks to its factory origin from the Mercedes brand, the hose ensures proper geometric fit and stable operating parameters in demanding temperature conditions.

Specifications and technical data

• SKU: A2055018982
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055018982
• Substitutable numbers: A2055018982, A 205 501 89 82
• Category: Coolant Hoses

Purpose and function in the cooling system

The coolant return hose in the W205 model is responsible for the safe return of the cooling medium to the circulation, which supports maintaining a stable engine operating temperature. A correctly selected component from the Cooling system pipes and hoses group reduces the risk of overheating, air locks, and local pressure drops in the installation.

The original design of the hose allows for maintaining the factory routing of the cooling lines, which is important for both reliability and service convenience. The proper shape and diameter of the connections facilitate installation and minimize the risk of leaks at the joints.

Benefits of using an original Mercedes hose

Using a coolant return hose dedicated to the W205 brings a number of practical operational benefits:

• factory fit for the cooling system of a specific body generation,
• maintenance of proper coolant flow across the entire engine load range,
• reduced risk of leaks thanks to appropriately selected ends and diameters,
• consistency with other cooling system components, such as the radiator or connection stubs.

For the user, this means more predictable engine operation, stable operating temperature, and less strain on other cooling system components. In the case of premium vehicles such as Mercedes, maintaining the original installation architecture has a direct impact on durability and driving comfort.

Characteristics of the used component

The offered hose comes from the used original parts segment, which allows for combining reasonable cost with the preservation of factory specifications. This type of component is particularly attractive for maintenance repairs when the priority is compliance with the manufacturer's solution and control of the service budget.

When choosing a used coolant return hose, it is worth paying attention to the condition of the working surfaces, material flexibility, and the absence of visible damage in the connection zones. A correctly selected and verified component allows for further, trouble-free vehicle operation without the need to interfere with the cooling system design.

Application in service practice

The coolant return hose in the Mercedes W205 is mounted in the engine compartment area and works in conjunction with other cooling pipes and hoses. During replacement, it is recommended to:

• check the condition of other hoses in the cooling system,
• verify the tightness of connections after installation,
• properly bleed the system after refilling the coolant.

Such a service approach helps reduce the risk of recurring faults and ensures stable operation of the entire cooling system in the long term.

Cooling system expansion and selection of related components

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

To better understand the impact of an efficient coolant circulation on engine durability, it is worth checking out our guide on cooling system operation at high temperatures – you can find it here: Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.