Radiator Coolant Hose Mercedes W204 C63 AMG Water Cooling Pipe A2045000075

Visual condition of the part 

The product shows signs of use visible in the photos. 

Radiator Coolant Hose Mercedes W204 C63 AMG Water Cooling Pipe is an original cooling system component from the Hoses, pipes and tubes group, designed for use in petrol engines. Engineered by the vehicle manufacturer, it ensures proper coolant flow, stabilizing the engine temperature and supporting safe, dynamic vehicle operation.

Specifications and technical data

• SKU: A2045000075
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045000075
• Substitutable numbers: A2045000075, A 204 500 00 75, BG
• Fuel type: Petrol
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The presented water hose is a cooling system component responsible for transporting coolant between engine sub-assemblies and accessories. In the case of C63 AMG petrol units, proper patency and tightness of the hoses are crucial for maintaining a stable operating temperature, protecting against overheating, and preserving the full efficiency of the lubrication and combustion systems.

Thanks to its factory geometry and fitment for a specific engine configuration, the hose maintains the correct positioning relative to other components, minimizing the risk of abrasion, kinking, or improper tension during engine operation.

Benefits of using an original water hose

Using an original water hose in a Mercedes C63 AMG allows for maintaining the consistency of the entire cooling system with the manufacturer's specifications. This translates into:

• proper coolant flow under high petrol engine loads,
• stable operation of the thermostat and radiator,
• reduced risk of leaks resulting from inaccurate fitment of aftermarket replacements,
• maintenance of the factory temperature characteristics of the engine.

For users who drive their car dynamically, it is particularly important that the original water hose has been designed with the high thermal loads typical of powerful petrol engines in mind.

Condition of the component and installation aspects

The offered hose belongs to the group of used parts, which allows for an economical repair of the cooling system while maintaining the original manufacturer's specification. Before installation, it is recommended to perform a standard check of tightness, material flexibility, and the condition of the connectors and contact surfaces with clamps to ensure trouble-free operation after replacement.

Due to the factory fitment for a specific body model and engine unit, the installation proceeds in an orderly manner – the hose is routed according to the original path, which facilitates service and reduces the time required for replacement.

Compatibility with petrol engines

The hose has been designed to work with the cooling system of engines powered by petrol fuel. This means it is properly adapted to the thermal characteristics of such units, including rapid temperature changes during sudden acceleration and operation at higher RPM ranges. Proper selection of the hose according to the fuel type is essential for maintaining material durability and resistance to operating conditions in the engine bay.

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 flexible water hoses, rigid pipes, or connecting hose sections, check the available parts in the Mercedes Hoses, pipes and tubes category.

Technical support and selection of used components

When selecting used technical system components – such as coolant hoses, suspension elements, or drivetrain components – it is worth being guided by both technical compatibility and the actual condition of the part. Additional information on the principles of selecting used sub-assemblies and the structural differences between stock and sports solutions can be found in the article Stock vs. sports suspension – design differences and is it worth buying used suspension parts?.