Mercedes W211 Radiator Coolant Hose Top Expansion Tank M271 A2115013582

Mercedes W211 Radiator Coolant Hose Top Expansion Tank M271 is an original cooling system component, designed for the precise connection of the upper radiator section to the expansion tank in M271 units. Thanks to its factory geometry and fitment, it ensures stable coolant flow and supports safe thermal engine operation. It is a practical solution for users and workshops looking for a proven hose for professional cooling system maintenance.

Specifications and technical data

• SKU: A2115013582
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2115013582
• Substitutable numbers: A2115013582, A 211 501 35 82
• Part type: Hose
• Category: Coolant Hoses

Function and role in the cooling system

The upper radiator hose connecting the radiator to the expansion tank in the M271 engine is responsible for transporting coolant between key system components. A correctly selected and leak-free hose:

• stabilizes coolant circulation in the upper part of the cooling system,
• reduces the risk of engine overheating,
• ensures proper venting and coolant volume compensation in the expansion tank,
• minimizes pressure losses in the section between the radiator and the tank.

By maintaining the factory shape and port diameters, the hose works with original clamps and mounts, which facilitates installation and service.

Construction and fitment for Mercedes W211 M271

The component has been designed specifically for the engine bay architecture of the Mercedes E-Class W211 generation with the M271 unit. This means that:

• the hose routing is consistent with the factory layout in the engine bay,
• the hose ends are matched to the radiator and expansion tank ports,
• appropriate flexibility is maintained to compensate for powertrain vibrations.

Such fitment reduces stress in the cooling system and decreases the risk of leaks at critical connection points.

Benefits of using an original hose

Using a radiator hose dedicated to the Mercedes W211 with an M271 engine brings a number of practical benefits for the user and the service center:

• Factory geometry – the hose fits according to the manufacturer's design, without the need for modifications or fitting universal hoses.
• Stable system operation – the correct cross-section and length of the section promote the maintenance of proper coolant flow.
• Easier diagnostics – maintaining the original hose routing facilitates visual inspection and the location of potential leaks.
• Compatibility with accessories – the hose works with factory brackets, guides, and covers in the engine bay.

For workshops, this means faster installation and a lower risk of complaints, and for the driver – more predictable and stable cooling system operation.

Condition, service application, and part selection

The offered component comes from the Cooling system hoses and pipes group and is intended for service applications in Mercedes W211 vehicles with the M271 unit. It is suitable for both preventive replacement and repairs following cooling system failures, such as leaks or engine overheating.

When selecting parts according to manufacturer markings, it is worth paying attention to compatibility with the specific engine version and vehicle year. For users who want to deepen their knowledge about the impact of the cooling system on engine durability, the following article will be helpful: Engine cooling system – overheating, repair, and used radiators.

If you want to better prepare for purchasing cooling system components online and verify how to safely choose used components, it is worth reading the guide: Safe purchase of used car parts online – a step-by-step guide.

Expanding the cooling system in the Mercedes W211

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

Combining properly selected hoses, an efficient radiator, and a leak-free expansion tank allows for maintaining a stable operating temperature for the M271 engine and reduces the risk of costly repairs resulting from overheating. Thanks to this, the Mercedes W211 maintains predictable performance even during intensive use in city traffic and on the highway.