Water Line Mercedes W204 X253 Petrol M274 Turbocharger Return A2742031002

The Mercedes W204 X253 Petrol M274 Turbocharger Water Return Hose is an original turbocharger cooling system component designed for M274 petrol engines. This hose provides factory-style coolant return from the turbocharger, supporting stable operating temperatures and engine durability.

Specifications and technical data

• SKU: A2742031002
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2742030602
• Substitutable numbers: A2742031002, A 274 203 10 02, A2742030602, A 274 203 06 02
• Fuel type: Petrol
• Category: Turbos & Parts

Purpose and function of the hose in the turbocharger system

The turbocharger return water line presented here operates in the cooling circuit, transporting heated fluid from the turbine housing to the rest of the system. A properly selected and leak-proof line:

• stabilizes the temperature of the turbocharger in the M274 petrol engine,
• reduces the risk of turbine bearings overheating,
• supports the maintenance of standard performance parameters,
• reduces the thermal load on the entire charging system.

By maintaining the original geometry and diameters of the connections, the hose enables correct flow of the coolant in accordance with the manufacturer's specifications.

Compatibility with Mercedes W204 and X253 with M274 petrol engine

The component is designed to work with the M274 petrol engine used in the W204 generation Mercedes C-Class models and X253 class SUVs. This means it will fit the factory system:

• turbocharger cooling in a petrol engine,
• routing cables in the engine compartment,
• mounting points and connections within the turbine and block.

Selecting a cable that is compatible with a specific engine and body type reduces the need for modifications, simplifies installation and allows the standard system architecture to be maintained.

Characteristics of the original used part

The hose offered falls into the turbocharger and parts category, meaning it is a component that directly interacts with the turbocharger and influences its operating conditions. As a used part:

• comes from the dismantling of the vehicle,
• retains the manufacturer's original design,
• may show signs of use that do not affect the fluid flow function.

Choosing an original used hose is a cost-effective solution while maintaining the factory geometry and compatibility with other components of the turbocharger cooling system.

Benefits of using the original return water line

The use of a dedicated hose for the M274 petrol engine in Mercedes W204 and X253 brings a number of practical service benefits:

• Stable turbine cooling – proper coolant flow helps maintain repeatable turbocharger operating parameters.
• Reduced risk of leaks – matched connections and factory-set cable length reduce mechanical stress on joints.
• Easier installation – the original shape of the cable makes it easier to route it in the engine compartment, without colliding with other components.
• Compatibility with the petrol system – the hose is adapted to the thermal and pressure conditions typical of supercharged petrol engines.

Professional selection of parts and additional materials

If you're looking for other turbochargers and parts for Mercedes, check out our turbochargers and parts section. This will help you easily assemble the remaining components for your turbocharging and cooling system.

Curious about how original used components contribute to the character of premium cars? Check out our blog article: How used parts help maintain the Audi brand DNA and factory quality – you'll find practical tips that you can also apply to servicing your Mercedes.