Mercedes W177 W247 Coolant Overflow Expansion Tank Bottle A2475000049

Mercedes W177 W247 Coolant Overflow Expansion Tank Bottle is a cooling system component designed for stable engine operation and safe discharge of excess coolant. The offered tank from the Expansion tanks group ensures proper fluid reserve and pressure control within the system, which translates into predictable operating conditions for the powertrain. Using an original component is a sensible choice for technical repairs or maintenance of the cooling system in Mercedes vehicles.

Specifications and technical data

• SKU: A2475000049
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2475000049
• Substitutable numbers: A2475000049, A 247 500 00 49
• Category: Expansion & Overflow Tanks

Function and role in the cooling system

The expansion tank in Mercedes W177 and W247 models is responsible for compensating for changes in coolant volume resulting from temperature fluctuations. A properly selected component:

• stabilizes pressure in the cooling system,
• allows for easy coolant level monitoring,
• reduces the risk of engine overheating,
• supports uniform fluid circulation throughout the entire circuit.

Thanks to this, the cooling system operates under predictable conditions, and the engine maintains the correct operating temperature, which promotes its durability.

Benefits of using an original expansion tank

The offered expansion tank is a component intended for Mercedes vehicles, which means maintaining factory geometry, mounting points, and connections. In practice, this translates into:

• secure fitment to hoses and brackets in the engine bay,
• no need for installation modifications,
• consistency with the factory cooling system design,
• maintenance of the original operating characteristics of the entire circuit.

Choosing a used, original tank is a technically sound solution for repairs where compatibility with factory specifications and predictable component behavior during long-term use are important.

Condition, installation, and service application

The presented expansion tank is a used component, making it an attractive cost-effective alternative while maintaining proper performance parameters. The design intended for specific Mercedes models facilitates installation in place of the factory tank, without the need for interference with the cooling system.

When replacing, it is recommended to:

• check the supply hoses and clamps,
• replace the coolant in accordance with the vehicle manufacturer's recommendations,
• bleed the system after installation,
• verify tightness after the engine has warmed up for the first time.

Such a service approach allows for fully utilizing the component's potential and reducing the risk of repeated interventions in the cooling system.

Application in the Mercedes Expansion tanks group

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 tanks, mounting elements, or caps, check the available parts in the Mercedes Expansion tanks category.

Additional technical support and knowledge

For extensive service work or powertrain modifications, it is worth expanding your knowledge about the impact of individual components on performance and unit durability. Practical tips on safe tuning and the use of used components can be found in the article How to increase engine power: a practical guide to engine tuning with used parts, which can be a useful supplement when planning broader work on the car.

Summary

Mercedes W177 W247 Coolant Overflow Expansion Tank Bottle is a functional cooling system element that allows for restoring the proper operation of the fluid circuit in vehicles of this brand. A used, original component from the Expansion tanks group provides a technically consistent solution for drivers who expect compatibility with the factory vehicle design and predictable system behavior in daily operation.