Mercedes W205 M274 Water Coolant Pipe Cooling Hose A2742000300

Mercedes W205 M274 Water Coolant Pipe Cooling Hose is an original cooling system component from the Hoses, pipes and tubes group, designed for use in Mercedes vehicles with the M274 engine unit. This used component allows for a technically correct replacement of a damaged section of the coolant circuit, while maintaining the factory fluid routing geometry and proper fitment to engine ports and accessories.

Specifications and technical data

• SKU: A2742000300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742000300
• Substitutable numbers: A2742000300, A 274 200 03 00
• Category: Hoses, Lines & Pipes

Technical characteristics of the water pipe

The water pipe used in the M274 engine is responsible for the stable routing of coolant between selected cooling system components, such as the engine block, connection housings, or auxiliary modules. A properly shaped pipe ensures correct medium flow, minimizes the risk of kinking, and reduces stresses resulting from engine operation and temperature changes.

The original craftsmanship characteristic of the Mercedes brand means maintaining the correct internal diameter, matched ends, and compatibility with factory clamps and mounts. As a result, the pipe operates stably under conditions of elevated temperature and pressure, which helps maintain the correct engine operating temperature.

Application in the Mercedes W205 M274 cooling system

In Mercedes C-Class W205 generation models with the M274 engine, the cooling system is precisely designed for efficiency and durability. A properly selected water pipe influences:

• maintaining the tightness of connections in the coolant circuit,
• stable fluid flow without local restrictions or blockages,
• correct heat dissipation from the engine unit,
• reducing the risk of overheating in city and highway driving conditions.

Using an original component from the same design group allows for maintaining the factory cooling system performance parameters, which is particularly important in modern turbocharged units sensitive to temperature fluctuations.

Benefits of using an original Mercedes pipe

Choosing a water pipe sourced from a dismantled Mercedes vehicle brings a number of practical advantages. Factory fitment translates into correct positioning in the engine bay, without the need for modifications or the use of additional adapters. This reduces installation time and lowers the risk of leaks resulting from improper fitment.

Original geometry and pipe diameter help maintain the coolant flow parameters designed by the manufacturer, which is significant for the durability of the engine and accessories. A used component allows for an economical repair while maintaining compliance with the factory specification, which is beneficial from both a service and vehicle operation perspective.

Condition, verification, and selection of parts

The element offered as used is intended for re-installation after a prior assessment of its physical condition, including inspection of the surface, shape, and connection ends. Before selecting a pipe for a specific vehicle, it is worth verifying compatibility with the engine unit used and the cooling system configuration, using catalog data or service documentation.

To facilitate identification in the store system, the pipe has assigned designations, such as SKU, OEM part number, and available interchangeable numbers. These details allow for precisely matching the component to a specific engine and body version, minimizing the risk of purchasing an incorrect part.

Product group and other system components

The pipe belongs to the Hoses, pipes and tubes group, which are components responsible for transporting working media in the vehicle – in this case, coolant. Within the same group, there are, among others, other sections of water pipes, flexible hoses, and rigid tubes routing fluid between the radiator, engine, and auxiliary components. 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 water pipes, flexible hoses, or return tubes, check the available parts in the Mercedes Hoses, pipes and tubes category.

Practical tips for purchasing used components

When choosing used technical system components, it is worth paying attention to how their condition is assessed, their service history, and the correctness of installation in the new vehicle. It is also good practice to familiarize yourself with guides on purchasing second-hand parts, which discuss common mistakes and ways to avoid them. To better understand the specifics of used components and consciously plan repairs, it is worth visiting the article: Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.