Coolant Hose Mercedes W213 W257 C238 Petrol OM256 Cooling Water Line A2575012800

Coolant Hose Mercedes W213 W257 C238 Petrol OM256 Cooling Water Line is an original cooling system component designed for petrol-powered engines. Engineered by Mercedes, it ensures precise coolant flow between engine components, which translates into stable operating temperatures and safe thermal load for the OM256 unit.

Specifications and technical data

• SKU: A2575012800
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2575012800
• Substitutable numbers: A2575012800, A 257 501 28 00
• Fuel type: Petrol
• Category: Coolant Hoses

Purpose and function in the cooling system

The described water line operates within the coolant circuit of the OM256 petrol engine, used in Mercedes E-Class W213, CLS W257, and C238 coupe models. Its task is to provide a tight and stable connection between cooling system components, ensuring smooth fluid flow and maintaining the engine at an optimal operating temperature.

Thanks to its factory geometry and precisely selected inner diameter, the hose ensures:

• correct coolant flow direction,
• adequate cooling efficiency under engine load,
• reduced risk of localized overheating in the OM256 area.

Construction and fitment for Mercedes W213, W257, C238

The hose was specifically constructed for the engine bay architecture of the W213, W257, and C238 models, which facilitates installation and minimizes stress on the connectors. Properly profiled sections and factory-standard ends allow for secure seating on cooling system ports without the need for modifications or adjustments.

In practice, this means that after proper installation, the hose:

• maintains connection tightness at typical system operating pressures,
• retains a stable position even under engine vibrations,
• does not interfere with adjacent components in the engine bay.

Operational characteristics and condition

The item comes from dismantling, meaning it is a used part, yet still intended for further use in the cooling system. Proper selection of the water line is crucial for protecting the petrol engine from overheating, which is why it is worth choosing components that comply with the manufacturer's factory specifications.

Using an original water line instead of a worn or leaking section allows you to:

• reduce the risk of coolant leaks,
• maintain a stable operating temperature for the OM256 engine,
• increase the reliability of the entire cooling system in daily operation.

Importance for the thermal safety of the petrol engine

In new-generation petrol engines, such as the OM256, the cooling system operates under relatively high thermal loads. A functional water line is one of the components that help maintain the proper thermal balance of the unit, protecting the cylinder head, block, and accessories from the effects of overheating.

To better understand the impact of individual components on engine durability and the symptoms of common faults, it is worth checking out our guide on the diagnostics and service of cooling systems: Engine cooling system – overheating, repair, and used radiators.

Complementary Mercedes cooling system components

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 water lines, flexible return hoses, or sections connecting to the radiator, check out the available parts in the category Mercedes cooling system hoses and pipes.

Summary of the OM256 water line application

Coolant Hose Mercedes W213 W257 C238 Petrol OM256 Cooling Water Line is a functional, original cooling system component dedicated to petrol engines. It ensures proper coolant flow, supports stable engine operating temperatures, and helps reduce the risk of costly failures resulting from overheating. Choosing such a hose is a sensible solution for users who expect compliance with the factory design and predictable cooling system behavior in daily operation.