Coolant Hose Mercedes W221 OM642 Diesel Engine Pump Pipe Line A6422030682

The Mercedes W212 W221 Water Coolant Hose OM642 is a component from the Hoses, Pipes & Tubes category, designed for diesel engine cooling systems. It ensures a stable flow of coolant, supporting the safe operation of the powertrain and reducing the risk of overheating. Thanks to its factory-fitted design for Mercedes, it guarantees predictable cooling system performance in daily use.

Specifications and technical data

• SKU: A6422030682
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6422030682
• Substitutable numbers: A6422030682, BG
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and Function in the Cooling System

The water coolant hose works with Diesel engines, ensuring proper fluid routing between key system components. Its correct shape and cross-sectional diameter allow for maintaining a stable flow, which translates to uniform heat dissipation from the OM642 powertrain. Using a dedicated hose minimizes the risk of leaks, pressure drops, and localized overheating.

In Mercedes W212 and W221 class vehicles, a correctly selected water coolant hose is crucial for:

• maintaining optimal operating temperature of the diesel engine,
• stable operation of the thermostat and coolant pump,
• reducing thermal stress on other auxiliary components.

Benefits of Using an Original Mercedes Hose

Using a hose dedicated to a specific powertrain ensures proper fitment to spigots, brackets, and routing within the engine bay. This limits material stress and minimizes the risk of rubbing against other components. The hose's appropriate geometry facilitates installation and servicing, and also allows for maintaining the factory coolant line routing.

The main advantages of this solution include:

• compatibility with the cooling system of diesel engines used in Mercedes W212 and W221,
• adaptation to the thermal conditions and operating pressures typical for the OM642 unit,
• suitability for repairs while adhering to the manufacturer's design specifications.

Component Condition and Service Application

The hose is a used part, removed from a dismantled vehicle, offering an economical repair for the cooling system while ensuring proper fitment. This type of part is particularly suitable for situations where the original hose has suffered mechanical damage, material wear, or thermal deformation. Replacing the water coolant hose is always recommended when cracks, surface crazing, signs of leaks, or deformations are visible.

Before installation, it is advisable to verify compatibility with the specific engine version and vehicle configuration, using the OEM number and interchangeable part numbers available in the technical specifications. This facilitates the selection of the correct component and reduces the risk of improper fitment.

Selection by OEM Number and Purchase Support

To ensure the hose is suitable for a specific Mercedes model, it is recommended to compare the data with the vehicle's documentation or VIN. Verifying the part number and reference numbers helps avoid ordering errors, especially with different diesel engine variants within the same model series. For users who want step-by-step guidance through the selection process, a practical guide will be helpful: Guide: How to Select the Right Car Part by VIN and OEM Number.

Other Coolant Hoses for Mercedes

If you are upgrading or comprehensively servicing the cooling system in your Mercedes and need additional components, such as other sections of coolant hoses, flexible hoses, or rigid pipes supplying fluid to individual components, check the available parts in the Mercedes Hoses, Pipes & Tubes category.