Mercedes W204 W207 Cooling Water Radiator Hose A2045010382

The Mercedes W204 / W207 Coolant Hose is an original part designed for the coolant circulation in vehicles of this series. Thanks to its factory geometry and precise fit for the specific platform, it ensures a stable connection between cooling system components and proper flow of the working medium, which translates to safe engine operation within the manufacturer's specified temperature range.

Specifications and technical data

• SKU: A2045010382
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045010382
• Substitutable numbers: A2045010382, A 204 501 03 82
• Category: Coolant Hoses

Technical Characteristics of the Radiator Hose

The offered hose belongs to the Cooling System Hoses and Pipes group, designed specifically for Mercedes vehicles of the W204 and W207 series. Its shape, diameter, and mounting points are adapted to the factory arrangement of spigots and clamps, which reduces the risk of stress, leaks, and collisions with other engine bay components.

This element is responsible for transporting coolant between key system components, supporting the maintenance of stable operating temperatures for the powertrain. A correctly selected hose minimizes the risk of overheating, reduced cooling efficiency, and failures resulting from system leaks.

Benefits of Using an Original Mercedes Hose

Using a hose dedicated to a specific generation of Mercedes vehicle translates into a number of practical advantages:

• factory fit for the cooling system in W204 / W207 models,
• stable hose routing in the engine bay, reducing vibrations and chafing,
• maintenance of the manufacturer's designed coolant flow characteristics,
• easier installation due to compatibility with original brackets and clamps.

For the user, this means greater predictability of the cooling system's operation and the ability to maintain parameters close to factory specifications without the need for system modifications.

Application in the Cooling System and Operational Aspects

The radiator hose in Mercedes C-Class and E-Class vehicles on the W204 / W207 platforms operates in an environment of variable temperatures and pressures, therefore its construction must ensure resistance to cyclic heating and cooling. A properly selected component helps to reduce the risk of:

• localized coolant leaks,
• pressure drops in the circuit,
• air ingress into the cooling system,
• engine overheating under heavy load.

Replacing the hose with a component that matches the factory specification is particularly recommended when noticeable signs of wear, rubber hardening, micro-cracks, or after previous cooling system repairs are observed. This allows for the restoration of integrity to the entire cooling circuit and reduces the risk of unplanned vehicle downtime.

Item Condition and Installation Recommendations

The offered coolant hose is a used item, which in practice means the possibility of an economical repair while maintaining the original manufacturer's specifications. This type of solution is often chosen for vehicles used intensively, where a reasonable balance between cost and maintaining the original system design is important.

During installation, it is recommended to:

• check the condition of the spigots and clamps,
• inspect other hoses in the cooling system for wear,
• bleed the system after filling with fresh coolant that complies with the vehicle manufacturer's recommendations.

This approach allows for the full utilization of the hose's potential and maintains stable operation of the entire cooling system in daily use.

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 hoses, return pipes, or sections connecting the radiator to the engine, check the available parts in the Mercedes Cooling System Hoses and Pipes category.

To better plan your service and understand the impact of temperatures on the efficiency of the entire circuit, it is worth reading the guide describing operation in high temperatures – details can be found in the article Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings.