Mercedes-Benz S-Class W221 Air Conditioning Expansion Tank Hose Pipe A2218301417

Mercedes-Benz S-Class W221 Air Conditioning Expansion Tank Hose Pipe is an original cooling system component designed for the precise routing of the medium between the expansion tank and other air conditioning components. Thanks to its factory-fit for the S-Class W221, it ensures stable air conditioning system performance as well as proper venting and circulation of the refrigerant within the installation. This solution is dedicated to users who wish to maintain a design consistent with the manufacturer's standards and avoid issues with leaks.

Specifications and technical data

• SKU: rhd-A2218301417
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218301417
• Substitutable numbers: A2218301417, A 221 830 14 17, BG
• Category: A/C Hoses & Fittings

Purpose and function in the air conditioning system

The offered hose is part of the Air conditioning lines, hoses, and connectors group, designed specifically for the Mercedes S-Class W221 limousine. It is responsible for a secure connection between the expansion tank and the rest of the installation, which is crucial for maintaining correct pressure and even distribution of the refrigerant throughout the entire system.

Using an original hose in this area helps reduce the risk of micro-leaks, cooling performance drops, or compressor operation issues resulting from improper medium flow. This is particularly important in the advanced comfort systems for which Mercedes is renowned.

Benefits of using an original hose

Choosing a factory hose for the S-Class W221 translates into a number of practical advantages in daily operation:

• secure fit to factory mounts and installation routing in the engine bay,
• preservation of the refrigerant flow geometry designed by the manufacturer,
• reduction of stress on connections and fittings due to the correct length and shape,
• easier installation and removal during air conditioning service.

As a result, the hose supports stable and consistent air conditioning system operation, which is important for both driving comfort and the durability of other components.

Condition of the item and service application

The offered hose is a secondary market component, which allows for an economical repair of the air conditioning system while maintaining the original design specifications. It is a good solution in situations where the existing hose has suffered mechanical damage, corrosion at the connections, or operational wear.

In practice, the hose will work well both for point replacement of a damaged section of the installation and for broader service work involving the refreshing of the entire air conditioning system in the Mercedes-Benz S-Class W221.

Compatibility and part selection

When selecting an expansion tank hose for the S-Class W221, it is worth paying attention to compatibility with the specific body version and air conditioning system configuration. The original element from the Mercedes range has been designed to work with factory components without the need for modifications or adaptations.

In case of doubt regarding selection, it is helpful to compare the hose routing and connector type with the element currently installed in the vehicle, which helps avoid installation problems and ensures a smooth repair process.

Expanding air conditioning service and related parts

If you are planning a comprehensive repair or upgrade of the air conditioning zone in your Mercedes and need other elements from the same group, such as flexible refrigerant hoses, rigid routing pipes, or service connectors, check the available parts in the Mercedes air conditioning lines, hoses, and connectors category.

More practical information about the advantages of using original, used sub-assemblies in cars of this brand can be found in the article Used parts for Mercedes – original components from dismantling, which discusses, among other things, the cost-effectiveness of repairs using factory elements from the secondary market.