Mercedes GLE C292 ML W166 Diesel M642 Coolant Hose Heater Water Line A1668307001

Mercedes GLE C292 ML W166 Diesel M642 Coolant Hose Heater Water Line is an original cooling system component designed for diesel engines, ensuring stable coolant circulation between the engine and the heater core. Thanks to its precise fit for Mercedes vehicles equipped with the Diesel OM642 unit, this hose supports the proper operation of the cabin heating system and helps maintain the correct engine operating temperature. It is a practical solution for users who want to restore full cooling system efficiency without compromising on compatibility.

Specifications and technical data

• SKU: A1668307001
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1668307001
• Substitutable numbers: A1668307001, A 166 830 70 01
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented hose belongs to the Cooling system hoses and pipes category and is responsible for transporting coolant between the engine and the heater core in Mercedes GLE C292 and ML W166 vehicles with the OM642 diesel engine. A correctly selected hose in this area is crucial for:

• maintaining a stable operating temperature of the power unit,
• efficient heater operation and thermal comfort inside the cabin,
• reducing the risk of engine overheating during intensive use.

The component has been designed specifically for the architecture of the Mercedes cooling system, which translates into proper hose routing, correct connection diameters, and a tight seal with other components.

Compatibility with the Diesel OM642 engine

The Diesel OM642 engine is an advanced diesel unit where the cooling system operates under significant thermal load. Using a dedicated water hose and heater lines allows for maintaining:

• proper coolant flow under variable engine loads,
• operational stability in both city and highway conditions,
• consistency with the factory configuration of the Mercedes cooling system.

As a result, the part fits well with the requirements of users expecting a technically correct repair without the need to use replacements with uncertain parameters.

Characteristics of the used component

The offered water hose and heater lines are salvaged parts, meaning they are pre-owned components that are still suitable for further use. This type of solution is often chosen by informed users who:

• are looking for original parts matched to a specific Mercedes model,
• want to optimize repair costs while maintaining proper functionality,
• prefer components that comply with the vehicle's factory specifications.

A used cooling system hose can be a good choice in situations where the existing component has suffered mechanical damage, delamination, or leaks, and the priority is to quickly restore the vehicle's efficiency.

Technical support and knowledge about the cooling system

When replacing cooling system hoses in a Mercedes, it is worth paying attention to the overall condition of the entire circuit – connectors, clamps, the radiator, and fans. To better understand how high temperatures affect the operation of the cooling system and why choosing the right components is important for engine durability, check out our guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. This is a practical addition to your knowledge when planning service in the cooling zone.

Expanding the cooling system in a Mercedes

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 pipes, return hoses, or fluid connectors, check out the available parts in the Mercedes cooling system hoses and pipes category.

Summary

Mercedes GLE C292 ML W166 Diesel M642 Coolant Hose Heater Water Line is a practical choice for users who want to restore proper coolant circulation between the engine and the heater core while maintaining compliance with the vehicle's factory design. A properly selected hose from the Cooling system hoses and pipes group supports the stable operation of the diesel unit, improves cabin heating comfort, and allows for a technically correct repair of the cooling system in Mercedes vehicles with the Diesel OM642 engine.