Mercedes W205 W213 C238 Coolant Reservoir Expansion Tank A2055000049

Mercedes W205 W213 C238 Coolant Reservoir Expansion Tank is an original cooling system component designed for Mercedes C-Class, E-Class, and coupe models. This component from the Expansion tanks group ensures stable cooling system operation, proper fluid circulation, and safe pressure relief within the system.

Specifications and technical data

• SKU: A2055000049
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2055000049
• Substitutable numbers: A2055000049, A 205 500 00 49
• Category: Expansion & Overflow Tanks

Function and role in the cooling system

The expansion tank in a Mercedes is responsible for compensating for coolant volume changes, maintaining the correct fluid level, and stabilizing pressure throughout the system. A properly selected and airtight tank minimizes the risk of engine overheating, facilitates system bleeding, and allows for quick detection of potential fluid leaks.

Using an original solution dedicated to specific generations of the Mercedes W205, W213, and C238 ensures proper fitment of the connections, correct sensor operation, and compatibility with the factory mounting system in the engine bay.

Construction and fitment for Mercedes W205, W213, C238

The presented expansion tank has been designed with the engine bay architecture of modern Mercedes C-Class, E-Class, and coupe versions in mind. The appropriately shaped housing, placement of connection ports, and designated mounting points allow for installation in factory locations without the need for modifications.

The original design ensures:

• proper routing of coolant hoses,
• correct interaction with the pressure cap and venting system,
• clear visibility for checking fluid levels in the engine bay.

Used condition and benefits of choosing OEM parts

This item comes from the secondary market, which allows you to combine an attractive purchase price with the preservation of the manufacturer's factory specifications. Choosing a used, original expansion tank for a Mercedes is often more beneficial than installing cheap aftermarket replacements, as you maintain consistency with the cooling system design and proper fitment with other components.

Before installation, it is recommended to perform a standard check for leaks, the condition of the ports and the cap seat, as well as to replace the coolant according to the vehicle manufacturer's recommendations. This approach increases the durability of the entire system and limits the risk of failures related to engine overheating.

Practical installation and maintenance tips

When replacing the expansion tank, it is worth paying attention to:

• the condition of the coolant supply and return hoses,
• the cleanliness of the system interior and any potential deposits in the old tank,
• proper bleeding of the system after filling it with fresh fluid.

Regularly checking the fluid level in the tank and observing for any leaks allows for early detection of cooling problems and helps avoid costly engine repairs. Using a dedicated expansion tank for Mercedes supports stable engine operating temperatures under various load conditions.

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 related system components, check the available parts in the Mercedes expansion tanks category.

Additional technical support

When working with technical vehicle components – both cooling and drivetrain – it is worth knowing the basic principles of assessing the condition of used parts. Practical advice on verifying components from the secondary market, recognizing signs of wear, and making informed choices can be found in the article: Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.

Summary

Mercedes W205 W213 C238 Coolant Reservoir Expansion Tank is a functional, original component from the Expansion tanks category, designed for modern Mercedes models. It ensures proper cooling system operation, facilitates fluid level monitoring, and provides a solid foundation for further vehicle maintenance, especially when changing fluid or upgrading the cooling system.