Cooling Hose Mercedes W204 W205 W212 Water Coolant Pipe Line A2742030302

The Mercedes W204 W205 W212 Coolant Water Hose Pipe Conduit is a component from the Cooling System Hoses and Pipes group, designed for operation in the fluid circuit of popular C-Class and E-Class models. It is responsible for the stable flow of coolant, which translates to a safe engine operating temperature and predictable performance of the powertrain under various operating conditions.

Specifications and technical data

• SKU: A2742030302
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742030302
• Substitutable numbers: A2742030302, A 274 203 03 02
• Category: Coolant Hoses

Function in the Cooling System

The coolant water pipe in Mercedes W204, W205, and W212 models is responsible for transporting the cooling medium between key system components. A correctly selected and sealed element helps maintain stable engine operating temperature, reduces the risk of overheating, and supports uniform heat dissipation from the block and head.

Thanks to its proper shape and fit to factory spigots, the pipe ensures adequate flow, minimizes fluid turbulence, and maintains correct system pressure. This, in turn, promotes uniform operation of the coolant pump and radiator efficiency.

Construction and Fitment for Mercedes W204, W205, W212

The hose in question is designed with the engine bay architecture of Mercedes C-Class and E-Class vehicles in mind, ensuring precise routing and no interference with other components. The pipe's geometry is adapted to factory mounting points, allowing for an organized installation process without requiring modifications to the existing system.

The element belongs to the Cooling System Hoses and Pipes group, meaning it is intended for operation in high-temperature environments and in contact with coolant. The appropriate stiffness and flexibility of the pipe facilitate correct positioning in the engine bay while minimizing the risk of kinks and localized flow restrictions.

Condition, Verification, and Service Application

The product is offered as a used part, allowing for economical repair of the cooling system while maintaining compliance with factory specifications. Such elements are often used in workshops specializing in Mercedes, particularly for maintenance repairs where reasonable cost and model-specific fit are important.

Before installation, a standard visual inspection of the pipe is recommended, checking the connection surfaces and the condition of the sockets for clamps or quick connectors. A correctly selected and installed pipe restores system integrity, reduces coolant loss, and stabilizes the powertrain's operating temperature.

Benefits of Using an Original Cooling Pipe

Using a pipe dedicated to specific generations of Mercedes C-Class and E-Class ensures:

• consistency with the factory routing of the cooling system,
• proper coolant flow in the engine bay,
• reduced risk of leaks at connections,
• easier installation without the need to modify other components.

For users who want to better understand the impact of a functional cooling system on powertrain longevity, the article: Engine Cooling System – Overheating, Repair, and Used Radiators will be helpful. It allows for correlating overheating symptoms with the actual condition of pipes, radiators, and other components.

Technical Support and Related Mercedes Cooling System Components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as additional pipes, return hoses, or sections connecting to the radiator, check the available parts in the Mercedes Cooling System Hoses and Pipes category.

Additional information on the operation and servicing of engine accessories in popular C-Class and E-Class models is provided in the blog post Reliability Under the Star – How to Care for Engine Accessories in Popular Mercedes-Benz C-Class and E-Class Models?, which helps in consciously planning maintenance and selecting replacement parts.