Mercedes W205 Water Hose Engine Cooling Coolant Pipe Line A2742003782

Mercedes W205 Water Hose Engine Cooling Coolant Pipe Line is an original cooling system component designed for the precise routing of coolant within the engine bay. Thanks to its factory-fit design for Mercedes W205 series models, it ensures a stable connection between cooling system components and supports safe heat dissipation from the engine unit.

Specifications and technical data

• SKU: A2742003782-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742003782
• Substitutable numbers: A2742003782, A 274 200 37 82
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented water pipe is a component of the Cooling system hoses and pipes category, responsible for transporting coolant between key engine components. Its task is to maintain a tight, stable flow of the cooling medium, which translates into the correct operating temperature of the engine and reduces the risk of overheating in both city and highway driving conditions.

The original design of the pipe, matched to the geometry of the W205 engine bay, allows for:

• reliable routing of coolant along the designated path,
• maintaining the correct bending radius without kinking,
• proper cooperation with cooling system ports and connectors.

Application in Mercedes W205 vehicles

The water hose has been designed specifically for the Mercedes W205 platform, which means its shape, connection diameters, and mounting point locations are adapted to factory mounting points. Such a fit reduces stress in the system, facilitates installation, and decreases the risk of leaks resulting from improper pipe positioning.

In practice, this translates into:

• easier installation without the need for modifications,
• maintaining the original routing of pipes in the engine bay,
• consistency with other Mercedes cooling system components.

Component characteristics and benefits of installation

As a component originating from a Mercedes vehicle, the water pipe maintains factory standards of workmanship and geometry. A used component of this type is a good choice for cooling system maintenance when you want to preserve the original vehicle specifications while controlling repair costs.

Replacing the water pipe in the cooling system is particularly recommended when symptoms appear such as:

• traces of coolant leakage near the connectors,
• a drop in coolant level without visible leaks at the radiator,
• cracks, dry rot, or deformation of the existing hose.

Selecting an original pipe with the correct specification helps maintain stable cooling system operation, which has a direct impact on engine durability and vehicle safety.

Technical support and part selection

When selecting a water pipe for a specific W205 engine version, it is worth paying attention to the configuration of the engine unit and the cooling system in the given vehicle. Proper component matching helps avoid installation problems and ensures the correct positioning of the pipe relative to other components in the engine bay.

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

Operation in high temperatures

The cooling system in modern vehicles operates under significant load, especially during the summer, during intensive driving, or in traffic jams. A functional water pipe is crucial for maintaining the appropriate pressure and flow of coolant, which reduces the risk of engine overheating.

To better understand the impact of high temperatures on the cooling system and the possibilities of optimizing service costs using used components, it is worth reading the guide "Summer heat vs. cooling system: used radiators and fans as a guarantee of savings", which discusses the practical aspects of operation and part selection in this area.