Mercedes W204 M274 Petrol Engine Coolant Hose Water Line Pipe A2742001682

The Mercedes W204 M274 Water Hose Pipe A2742001682 is an original cooling system component designed for petrol engines, specifically for Mercedes vehicles. It is responsible for precisely directing coolant, which directly impacts stable engine operating temperature and operational safety.

Specifications and technical data

• SKU: A2742001682-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742001682
• Substitutable numbers: A2742001682, A 274 200 16 82
• Fuel type: Petrol
• Category: Coolant Hoses

Function in the Cooling System

The water hose, part of the Cooling System Hoses and Pipes category, is responsible for transporting coolant between key engine and accessory components. A correctly selected and sealed hose:

• ensures stable coolant flow under varying engine loads,
• limits the risk of localized overheating in the cylinder head and block areas,
• maintains correct pressure within the cooling system,
• supports uniform heat dissipation from the engine.

For petrol engines like the M274, proper flow and sealing of water hoses are particularly crucial for engine durability and stable operation across the entire RPM range.

Original Fit for Mercedes W204 with M274 Engine

The presented hose has been designed with the specific engine bay geometry of the Mercedes C-Class W204 generation with the M274 unit in mind. This means:

• precise shape matching to factory mounting points and routing within the engine bay,
• maintaining the correct distance from hot and moving components,
• compatibility with original cooling system spigots and connectors.

This ensures a tidy installation without the need for modifications or non-factory clamps and adapters, which is important for both mechanics and owners who wish to maintain the original system logic.

Characteristics of a Used Part

The offered water hose is a used part, allowing for an economical repair of the cooling system while maintaining the original manufacturer's specifications. A used component of this type is a good solution when:

• you want to maintain consistency with the factory cooling system design,
• you prioritize the original hose shape and diameter,
• you are looking for a cost-effective way to restore the system's full functionality.

Choosing an original part from a dismantled vehicle reduces the risk of fitment issues that can occur with random aftermarket replacements of different geometry.

Importance for Engine Thermal Safety

A functional water hose in the M274 petrol engine directly contributes to protecting the unit from overheating. Leaks, pressure drops, or kinks in the hose can lead to:

• localized temperature increases in the cylinder head area,
• accelerated wear of seals and aluminum components,
• emergency engine shutdown under heavy load.

Regular inspection of hose condition and replacement at the first signs of wear is a simple way to extend the engine's lifespan and maintain stable operating parameters in daily use.

Cooling System Expansion and Educational Materials

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

To better understand the impact of a functional coolant circulation on engine durability, it is worth reading the guide describing typical overheating symptoms and the importance of a properly functioning cooling system – this is discussed in detail in the article Engine Cooling System – Overheating, Repair, and Used Radiators.