Mercedes W205 Water Hose Radiator Coolant Cooling Pipe Line A2055010891

Mercedes W205 Water Hose Radiator Coolant Cooling Pipe Line is an original component from the Cooling system hoses and pipes group, designed for use in the cooling system of Mercedes C-Class W205 generation models. This used, factory-spec hose ensures proper coolant flow between the radiator and other components, supporting stable engine operating temperatures and safe heat dissipation.

Specifications and technical data

• SKU: A2055010891-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055010891
• Substitutable numbers: A2055010891, A 205 501 08 91
• Category: Coolant Hoses

Function and role in the cooling system

The water radiator hose in a Mercedes W205 is responsible for the controlled flow of coolant in the circuit between the radiator and the engine. A properly selected and leak-free hose:

• maintains a stable flow of liquid in the required direction,
• minimizes the risk of engine overheating,
• ensures adequate flexibility during engine operation and body vibrations,
• reduces the possibility of leaks at connections with connectors and housings. Thanks to the preservation of factory geometry and connection diameters, the hose works with other cooling system components without the need for modifications.

Original origin and fitment for Mercedes W205

As a Mercedes brand component from the OEM group, the water radiator hose is structurally matched to the engine bay architecture of W205 models. This means:

• consistent hose routing relative to factory brackets and mounts,
• correct end diameters for clamps and quick-connectors,
• appropriate material stiffness and flexibility for the cooling system's operating temperature,
• compatibility with original radiator connectors and engine components. Such fitment facilitates installation, reduces service time, and lowers the risk of leaks resulting from imprecise fitting.

Characteristics of the used hose

The item is offered in used condition, which in practice means it has been removed from a vehicle and verified for further operational suitability. In the context of cooling system hoses, it is particularly important that:

• the hose walls retain adequate flexibility and are not excessively cracked,
• the hose ends are not deformed in a way that would hinder a leak-free installation,
• the working surface does not show signs of deep mechanical damage. Choosing a used, original water radiator hose is a reasonable compromise between cost and maintaining the factory specifications of the cooling system.

Practical installation and maintenance tips

When replacing the water radiator hose in a Mercedes W205, it is worth paying attention to several technical aspects:

• checking the condition of clamps or quick-connectors and replacing them if necessary,
• thoroughly cleaning the connectors of deposits before installing the hose,
• properly routing the hose according to the factory layout, maintaining clearance from hot exhaust components,
• bleeding the cooling system after refilling with fresh coolant. This approach helps maintain stable engine operating temperatures and reduces the risk of failures resulting from overheating or sudden loss of coolant. If you are planning a comprehensive repair or upgrade of the cooling system area in your Mercedes and need other components from the same group, such as additional pipes, return hoses, or sections connecting to the heater core, check out the available parts in the Mercedes cooling system hoses and pipes category.

More about cooling systems and accessories

When diagnosing temperature problems in a car, it is worth looking more broadly at the entire system, including cooperating components such as the radiator, water pump, thermostat, or air conditioning elements. If you are interested in when it pays to reach for original used components instead of new replacements and how to select them correctly, check out the guide: Lack of cooling in the car: original used air conditioning compressor as a proven alternative to expensive new parts.