Mercedes SLK R171 Petrol Heater Water Hose Coolant Pipe Line A1718300224

Mercedes SLK R171 Petrol Heater Water Hose Coolant Pipe Line is an original cooling system component designed for use with petrol engines. As part of the Cooling system hoses and pipes group, it ensures stable coolant flow between components, supporting the correct operating temperature of the engine and interior heating.

Specifications and technical data

• SKU: rhd-A1718300224
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1718300224
• Substitutable numbers: A1718300224, A 171 830 02 24, A1718300024, A 171 830 00 24
• Fuel type: Petrol
• Category: Coolant Hoses

Function in the cooling system

This water hose is responsible for transporting coolant in the circuit between the heater core and other cooling system components in the Mercedes SLK R171 with a petrol engine. A correctly selected and leak-free hose:

• maintains stable coolant flow in the heating and cooling circuit,
• reduces the risk of engine overheating under load and in city traffic,
• supports efficient heater operation and thermal comfort in the cabin.

Thanks to the preservation of factory geometry and connection diameters, the hose works with other system components without the need for modifications.

Why choose an original Mercedes hose

The original water hose from the Cooling system hoses and pipes group is designed for a specific vehicle platform, which translates into:

• precise fit to the nozzles and mounts in the engine bay,
• maintenance of the correct bending radius without flow kinks,
• compatibility with factory clamps and mounting brackets.

The used part allows for economical repair while maintaining the performance characteristics intended by the vehicle manufacturer. This solution is particularly beneficial when servicing older vehicles, where a reasonable balance between cost and functionality is important.

Application in petrol engines

The hose is designed to work with the petrol engine cooling system in the SLK R171 model. This means its construction takes into account:

• typical operating temperatures of petrol units,
• pressures occurring in the coolant circuit,
• operating conditions in the engine bay (vibrations, temperature changes, contact with other components).

Selecting a hose compatible with the fuel type reduces the risk of leaks and improper fluid routing in the system.

Practical benefits of installation

Installing this hose in a Mercedes SLK R171 allows for restoring proper coolant circulation in the area of the heater core and related components. In practice, this means:

• reducing the risk of water or coolant leaks in the hose area,
• more stable engine operating temperature in city and highway conditions,
• more efficient cabin heating at low outside temperatures.

For workshops and individual users, this is a way to perform a technically correct and cost-effective cooling system repair.

Expanding cooling system service

When replacing the water hose, it is worth verifying the condition of other cooling system components – especially the radiator, fans, thermostat, and other flexible hoses. High summer temperatures put a heavy load on the entire system, so a comprehensive approach to service helps avoid further vehicle downtime.

If you want to better understand how summer conditions affect cooling efficiency and where to look for savings during repairs, check out the guide Summer heat vs. cooling system – used radiators and fans as a way for economical repair.

Other Mercedes cooling system hoses and pipes

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 additional water pipes, flexible radiator hoses, or sections leading fluid to the heater core, check the available parts in the category Mercedes cooling system hoses and pipes.