Mercedes V251 W251 A/C Air Con Refrigerant Line Coolant Hose A2518304015

Mercedes V251 W251 A/C Air Con Refrigerant Line Coolant Hose is an original A/C system component designed for precise refrigerant routing within the air conditioning installation. Thanks to its factory-fit for the V251/W251 platform, it ensures stable cabin cooling system performance and proper compatibility with other air conditioning components.

Specifications and technical data

• SKU: RHD-A2518304015
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2518304015
• Substitutable numbers: A2518304015, A 251 830 40 15
• Part type: Hose
• Category: A/C Hoses & Fittings

Purpose and function in the air conditioning system

The offered hose belongs to the Air conditioning lines, hoses, and connectors category and is a component of the refrigerant installation in Mercedes V-Class/R-Class models on the V251/W251 platform. It is responsible for the sealed and controlled routing of refrigerant between A/C system components, which has a direct impact on cooling efficiency and uniform temperature distribution in the cabin.

The factory geometry of the hose, appropriately selected diameters, and connector shapes allow for correct installation in the engine bay and chassis, minimizing the risk of vibrations, chafing, and leaks. This is particularly important in Mercedes vehicles, where the air conditioning system is complex and interacts with advanced control electronics.

Benefits of using an original A/C hose

Using an original refrigerant line in a Mercedes V251/W251 allows for maintaining factory air conditioning performance without the need for system modifications. In practice, this means:

• secure fitment to existing mounts and brackets in the bodywork,
• proper cooperation with the compressor, condenser, evaporator, and receiver-drier,
• maintenance of the flow rates and pressures designed by the manufacturer,
• reduced risk of leaks after air conditioning service.

For workshops and users, this means more efficient installation, fewer potential points of failure, and more predictable air conditioning operation after the repair is completed.

Product characteristics and condition

The refrigerant line comes from the Mercedes brand, which guarantees compliance with the vehicle's factory technical documentation. The item is classified as used, which in practice means it has been removed from a donor vehicle and is intended for reinstallation after standard workshop verification (leak tightness, condition of connectors, absence of mechanical damage preventing installation).

Choosing an original, used A/C hose is a reasonable compromise between repair costs and maintaining high-quality components, especially in premium-class cars where the air conditioning system has a significant impact on daily driving comfort.

Professional installation and part selection

Due to the specific nature of Mercedes air conditioning systems, it is recommended that the hose installation be performed by a workshop equipped with appropriate A/C service tools (refrigerant recovery and charging station, vacuum pump, leak detector). Proper installation includes:

• checking the condition of sockets and seals in the vehicle,
• replacing O-rings in accordance with service procedures,
• performing a leak test before filling the system,
• filling the system with the correct amount of refrigerant and oil.

This approach allows for fully utilizing the potential of the offered hose and ensuring stable, comfortable air conditioning operation in the long term.

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 high-pressure lines, flexible hoses, or service connectors, check the available parts in the Mercedes air conditioning lines, hoses, and connectors category.

More about used Mercedes parts

When selecting used components for premium-class cars, it is worth knowing the specifics of original parts and the differences between aftermarket replacements and salvaged parts. If you want to better understand how to safely use salvaged components in your vehicle of this brand, read the article Used Mercedes parts – original salvaged components, where you will find practical tips on making informed component choices.