Mercedes R170 M111 Coolant Hose Radiator Engine Water Cooling Line A1705011282

The Mercedes R170 M111 Coolant Hose is an original water line connecting the radiator to the engine, designed for precise coolant flow within the system. Thanks to its factory geometry and fit for the M111 unit, it ensures stable cooling parameters and proper fluid circulation throughout the entire circuit. This is a practical solution for users seeking a proven cooling system component for their Mercedes.

Specifications and technical data

• SKU: A1705011282
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1705011282
• Substitutable numbers: A1705011282, A 170 501 12 82
• Category: Coolant Hoses

Purpose and Function in the Cooling System

This hose belongs to the Cooling System Hoses and Pipes group and is responsible for transporting coolant between the radiator and the engine in Mercedes models with the M111 unit in the R170 body. A correctly selected water line reduces the risk of localized overheating, helps maintain a stable operating temperature, and supports uniform heat dissipation from the engine block.

The original hose design ensures:

• appropriately shaped routing within the engine bay,
• the correct internal diameter for fluid flow,
• compatibility with factory radiator and engine spigots.

Benefits of Using an Original Mercedes Hose

Using a coolant hose dedicated to the Mercedes R170 with the M111 engine allows for the preservation of the cooling system's original operating characteristics. Proper component fit translates to:

• reduced risk of leaks at connections due to the correct end profile,
• maintenance of the manufacturer's designed coolant flow rate,
• easier installation without the need for modifications or fitting universal hoses.

This is particularly important in vehicles where the cooling system operates under thermal load, and any drop in performance can lead to engine overheating.

Professional Selection and Installation

When replacing a coolant hose, it is advisable to check the condition of other circuit components – spigots, clamps, and the radiator itself. A correctly selected hose, working with original components, helps maintain system tightness and reduces the risk of long-term operational failures. This product is suitable for both standard replacement of a worn-out part and more extensive service work in the engine bay.

Technical Support and Cooling System Knowledge

If you want to better understand how the selection of hoses, radiators, and other components affects engine durability, it is worth consulting specialized materials. Practical information on overheating symptoms, diagnostics, and operation can be found in the article Engine Cooling System – Overheating, Repair, and Used Radiators, which discusses real-world examples from popular models and helps in consciously planning repairs.

Related Mercedes Cooling System Components

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other parts from the same group, such as additional hoses, return hoses, or heater core lines, check the available parts in the Mercedes Cooling System Hoses and Pipes category.