Mercedes C300h W205 Air Conditioning Cutoff Valve A2228307904

Mercedes C300h W205 Air Conditioning Cutoff Valve is a precision component of the cabin cooling system, belonging to the Air conditioning lines, hoses, and connectors group. It is responsible for the controlled shut-off of refrigerant flow in the system, which translates into stable compressor operation and predictable cooling parameters. This used, original Mercedes component allows you to maintain the factory performance characteristics of the air conditioning in the C300h W205 model.

Specifications and technical data

• SKU: A2228307904
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2228307904
• Substitutable numbers: A2228307904, A 222 830 79 04
• Part type: Fitting
• Category: A/C Hoses & Fittings

The role of the cutoff valve in the air conditioning system

The air conditioning cutoff valve in the Mercedes C300h W205 works in direct connection with refrigerant lines and service connectors. Its task is to precisely control the flow of the medium in specific sections of the system, which:

• stabilizes pressure in the air conditioning circuit,
• limits unwanted compressor load spikes,
• facilitates diagnostics and servicing of individual line sections,
• supports the maintenance of an even air temperature in the cabin. By maintaining the factory geometry and flow characteristics, the air conditioning cutoff valve for the Mercedes C300h W205 helps restore proper system operation after repairs or the replacement of other system components.

Construction and integration with air conditioning lines, hoses, and connectors

The presented element belongs to the Air conditioning lines, hoses, and connectors group, which means it works directly with flexible and rigid sections of the system as well as service connectors. The valve's construction is prepared for operation in high-pressure environments and variable temperatures, typical for air conditioning systems in premium hybrid vehicles. Original manufacturing for the Mercedes brand ensures:

• precise fitment to factory lines and connectors,
• correct positioning in the engine bay,
• maintenance of airtightness after proper installation,
• compatibility with the operating parameters of the air conditioning system in the C300h W205.

Benefits of using an original Mercedes component

Choosing an original air conditioning cutoff valve for a Mercedes brings a number of practical advantages in daily vehicle operation:

• Consistency with the factory system design – maintaining the flow and pressure characteristics intended by the manufacturer.
• Better cooperation with other components – lines, hoses, connectors, and the air conditioning compressor.
• Reduced risk of leaks – thanks to the proper fit of seats and sealing surfaces.
• Stable air conditioning operation – especially important in hybrid cars, where thermal comfort also affects energy efficiency. A used, original Mercedes component represents a reasonable compromise between repair costs and maintaining a high level of reliability and compliance with the manufacturer's design.

Condition, selection, and application in the Mercedes C300h W205

The offered air conditioning cutoff valve comes from a group of used parts, which allows for lower repair costs while maintaining the original manufacturer's specifications. Before installation, a standard service procedure is recommended: checking the system for leaks, replacing seals at critical points, and performing a pressure test after assembling the system. To correctly select the element for a specific Mercedes C300h W205, it is worth verifying compatibility with the vehicle's air conditioning system based on technical data and part numbers in the service documentation. This ensures the valve will work with existing lines, hoses, and connectors without the need for additional modifications.

Technical support and additional materials

When diagnosing cabin cooling problems, knowledge about the operation of the compressor and the entire refrigerant circuit can be helpful. It is worth reading the guide Air conditioning compressor – symptoms of failure, causes, and safe replacement, which makes it easier to understand the relationship between the compressor and flow control elements, such as cutoff valves. 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 lines, rigid pipe sections, or service connectors, check the available parts in the Mercedes air conditioning lines, hoses, and connectors category. Additional arguments for choosing original, used components for premium cars are provided in the article Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026, which discusses current market realities and the benefits of sensible parts selection.