Mercedes W205 W212 M274 Engine Heat Exchanger Coolant Hose Pipe A2742031382

Mercedes W205 W212 M274 Engine Heat Exchanger Coolant Hose Pipe is an original cooling system component from the Lines, hoses and pipes group, designed for use in Mercedes vehicles with the M274 engine. This used OEM part ensures factory-standard coolant flow geometry, which promotes stable engine operation and reduces the risk of leaks in the water circuit.

Specifications and technical data

• SKU: A2742031382
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742031382
• Substitutable numbers: A2742031382, A 274 203 13 82
• Category: Hoses, Lines & Pipes

Purpose and function in the cooling system

The coolant hose pipe in Mercedes W205 and W212 models with the M274 engine is responsible for directing coolant between key system components. A properly selected hose minimizes pressure drops, ensures stable flow, and helps maintain optimal engine operating temperature under various load conditions.

The original design of the hose is tailored to the engine bay space, which facilitates installation and reduces stress on ports and connectors. This reduces the risk of micro-cracks, abrasions, and leaks that could lead to engine overheating.

Benefits of using an original coolant hose

Using a factory coolant hose in Mercedes W205 and W212 series vehicles allows for compliance with the manufacturer's design and cooling system operating parameters. This is particularly important in modern M274 units, where operating temperature and thermal stability have a direct impact on engine durability and performance smoothness.

• Factory fitment for the cooling system and engine bay mounts.
• Consistent hose diameter and profile promoting uniform fluid flow.
• Reduced risk of leaks at connections due to proper geometry.
• Consistency with other cooling system components in Mercedes vehicles.

For the user, this means more predictable cooling system behavior, easier diagnostics of potential faults, and seamless compatibility with other factory components.

Installation and operational characteristics

The coolant hose pipe from this series has been designed for installation in specific body and engine variants, which translates into service convenience. The properly contoured shape of the hose facilitates routing between engine accessories without colliding with other components.

When replacing the hose, it is recommended to:

• check the condition of clamps and connectors,
• verify the tightness of the entire circuit after filling with fresh coolant,
• bleed the system according to the service procedure for the specific model.

This approach allows for full utilization of the original hose's potential and reduces the risk of needing to re-intervene in the cooling system in the near future.

Hose selection and compatibility

To correctly select this component for a specific vehicle, it is worth verifying compatibility with the M274 engine designation and the body generation (W205 or W212). The original coolant hose from this series has an assigned OEM part number and interchangeable numbers, which facilitates matching in service catalogs and parts selection systems.

In the case of extensive cooling system repairs, such as replacing the radiator, thermostat, or water pump, using a hose with factory specifications helps maintain the integrity of the entire system and avoid problems resulting from imprecise aftermarket replacements.

System expansion – other hoses and cooling elements

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 flexible hose sections, rigid guide pipes, or additional circuit branches, check the available parts in the Mercedes lines, hoses and pipes category.

For drivers interested in comparing technical solutions used in different brands and sports versions, including cooling systems, engines, and chassis, an article describing the differences between standard and sports versions may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.