Bleed Line Mercedes W118 W177 W247 Coolant Expansion Tank Hose A2475010425

Bleed Line Mercedes W118 W177 W247 Coolant Expansion Tank Hose is an original component from the Cooling system hoses and pipes group, designed for operation in the cooling systems of modern Mercedes engines. This used component ensures factory-spec fluid flow geometry, which facilitates maintaining a stable engine temperature and reduces the risk of overheating.

Specifications and technical data

• SKU: A2475010425
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A247501425
• Substitutable numbers: A2475010425, A 247 501 04 25
• Category: Coolant Hoses

Purpose and function in the cooling system

The coolant hose used in the W118, W177, and W247 series models is responsible for the controlled transport of coolant between system components. A properly selected hose:

• ensures a tight connection between cooling system components,
• maintains the correct flow cross-section, reducing pressure drops,
• stabilizes fluid circulation under varying thermal load conditions.

By maintaining the original hose design, the cooling system can operate within the parameters specified by the manufacturer, which promotes uniform heat dissipation from the engine.

Construction and performance properties

The coolant hose in this application is designed to operate at elevated temperatures and in contact with the operating fluids used in Mercedes engines. The hose construction accounts for:

• a profile adapted to the engine bay layout in W118, W177, and W247 models,
• appropriate flexibility, allowing for the compensation of engine vibrations,
• shape retention under operating temperature and pressure.

A component configured in this way helps reduce the risk of leaks, kinks, and local constrictions that could disrupt coolant flow.

Benefits of using an original Mercedes hose

Using a cooling hose sourced from Mercedes allows for maintaining the structural integrity of the system. Key advantages include:

• Factory fit for mounts and connectors – no need for modifications or diameter adjustments.
• Predictable behavior under operating conditions – a component designed for specific models.
• Possibility of verifying compatibility via part numbers in the technical specification – facilitates selection for a specific engine version.

A used element of this type is a good solution for cooling system maintenance when the goal is to preserve the original hose geometry and compatibility with factory clamps and connectors.

Selection and diagnostics of the cooling system

When replacing a coolant hose, it is worth paying attention to the general condition of the cooling system – the tightness of connections, the condition of the radiator, thermostat, and water pump. A properly selected hose should comply with the markings in the vehicle's service documentation, which minimizes the risk of incorrect installation and subsequent leaks.

For users who want to better understand the impact of hoses and other components on engine operating temperature, the following guide will be helpful: Engine cooling system – overheating, repair, and used radiators. The article discusses the relationships between cooling system design and engine durability, which facilitates making informed service decisions.

Expanding the Mercedes cooling system

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 pipes, flexible hoses, or sections connecting the radiator to the engine, check the available parts in the Mercedes cooling system hoses and pipes category.