Mercedes R170 Coolant Water Heater Pipe Hose A1708320494

The Mercedes R170 Coolant Heater Hose is an original cooling system component designed for precise fluid circulation between the engine and the heater core. Thanks to its factory-matched geometry and fit for the R170's construction, this part from the Hoses, Tubes, and Pipes group ensures stable operating parameters for the cooling and cabin heating systems. It's a practical solution for users seeking parts that comply with original Mercedes factory standards.

Specifications and technical data

• SKU: rhd-A1708320494
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1708320494
• Substitutable numbers: A1708320494, A 170 832 04 94
• Category: Hoses, Lines & Pipes

Function in the Cooling and Heating System

The heater hose is responsible for the controlled flow of coolant between the engine block and the cabin's heat exchanger. A correctly selected component:

• ensures stable medium flow across the entire operating temperature range,
• reduces the risk of localized overheating around the heater core,
• maintains the seal of connections with the cooling system's spigots,
• supports the uniform operation of the vehicle's interior heating.

By preserving the original shape and connection diameters, the hose integrates with other system components without requiring modifications, leading to stable engine operation and thermal comfort in the cabin.

Construction and Fit for Mercedes R170

Its original Mercedes origin means the hose was specifically designed for the engine bay architecture of the R170 model. In practice, this translates to:

• appropriately selected wall stiffness and flexibility,
• geometry tailored for routing along factory brackets and mounts,
• compatibility with original cooling system connectors.

This precise fit minimizes hose stress during engine operation, reduces the risk of abrasion, and facilitates installation in the confined engine bay space. Replicating the original hose routing is crucial for the durability of the entire system.

Item Condition and Service Application

The hose is offered as a used part, allowing for an economical repair of the cooling system while maintaining original manufacturer specifications. This type of component is particularly suitable for situations where:

• the existing hose shows signs of cracking, swelling, or leaks,
• replacement is necessary after a cooling system failure,
• preserving the original hose routing in the engine bay is a priority.

Using an original part from the Hoses, Tubes, and Pipes group helps avoid problems typically associated with aftermarket replacements that have imprecise shapes or diameters.

Benefits of Choosing an Original Heater Hose

Opting for a factory heater hose for the Mercedes R170 is a solution that combines correct functionality with ease of installation. Key advantages include:

• Factory Fit – the hose is designed for the specific platform, requiring no modifications.
• Stable Cooling System Operation – proper fluid flow and reduced risk of air pockets around the heater core.
• Compatibility with Other System Components – works seamlessly with original spigots, clamps, and hose routing.

As a result, the coolant heater hose is a practical choice for routine maintenance repairs and for restoring the full functionality of the heating system in a Mercedes R170.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as coolant hoses, heater hoses, or return pipes, check the available parts in the Mercedes Hoses, Tubes, and Pipes category.

For drivers interested in further enhancing interior comfort and ergonomics, including altering the driving experience by installing a more advanced steering wheel, the guide article on replacing the steering wheel with a premium, sport, or AMG model may be helpful, discussing the practical aspects of such a modification.