Mercedes W204 C207 W212 Heater Line Coolant Hose Petrol M271 A2128301696

Mercedes W204 C207 W212 Heater Line Coolant Hose Petrol OM271 is an original cooling system component designed for Mercedes C-Class, E-Class, and coupe models. As part of the Cooling system hoses and pipes group, it ensures stable coolant flow to the heater core, which translates into efficient cabin heating and the correct operating temperature for the petrol engine. This is a practical solution for users looking for a factory fit without compromising on functionality.

Specifications and technical data

• SKU: A2128301696-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2128301696
• Substitutable numbers: A2128301696, A 212 830 16 96
• Fuel type: Petrol
• Part type: Hose
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented heater coolant hose operates in the coolant circuit between the engine and the heat exchanger in the cabin. It is responsible for:

• stable delivery of coolant to the heater core during petrol engine operation,
• maintaining a tight seal in a critical section of the cooling system,
• proper circulation of the heat transfer medium, which supports both interior heating and the dissipation of excess heat from the power unit.

Thanks to its factory geometry and connection diameters, the hose is matched to the cooling system in Mercedes vehicles with the OM271 petrol unit, which reduces the risk of stress, twisting, and leaks after installation.

Benefits of using an original coolant hose

Using an original hose instead of a worn or leaking component allows for the restoration of proper cooling system performance. Key advantages include:

• factory fit for connectors and routing in the engine bay,
• preservation of the coolant flow path designed by the manufacturer,
• reduced risk of leaks in the heater zone and engine connections,
• stable cabin heating performance under various thermal loads.

For users who want to maintain the structural integrity of the vehicle, choosing an original hose from the Cooling system hoses and pipes group is a technically safe and predictable solution for maintenance.

Technical characteristics and compatibility

The hose has been designed to work with the OM271 petrol engine, meaning it is adapted to the temperatures and operating pressures typical for this unit. The design of the hose includes:

• properly selected flexibility, allowing for the compensation of powertrain vibrations,
• a shape adapted for routing in the engine bay without collision with other components,
• connectors prepared for use with factory clamps and quick-connect fittings.

This type of hose is an essential element for maintaining a uniform engine operating temperature, which affects the durability of the power unit, fuel consumption, and vehicle comfort.

Product condition and service application

The item comes from disassembly and is offered as a used part, which is a cost-effective solution while maintaining the original manufacturer's specifications. This choice is particularly suitable for:

• routine cooling system repairs after detecting leaks or a drop in coolant levels,
• preventive replacement of hoses in vehicles operated in varied temperature conditions,
• servicing vehicles where maintaining original design solutions is a priority.

Before installation, it is recommended to perform a standard check of connection tightness and the condition of cooperating cooling system components to fully utilize the part's potential.

Technical support and additional materials

To better understand the impact of an efficient coolant circuit on the durability of the power unit and the symptoms of overheating, it is worth reading the guide article Engine cooling system – overheating, repair, and used radiators, which discusses practical aspects of diagnostics and operation of cooling systems in modern cars.

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