Mercedes W205 Coolant Hose Air Conditioning Pipe Line Tube Petrol A2058303903

Mercedes W205 Coolant Hose Air Conditioning Pipe Line Tube Petrol is an original cabin cooling system component designed for vehicles with a petrol engine. It ensures tight and stable routing of the refrigerant, which translates into efficient air conditioning operation and thermal comfort inside the vehicle. This is a solution for users looking for factory fitment and predictable system performance parameters.

Specifications and technical data

• SKU: A2058303903
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2058303903
• Substitutable numbers: A2058303903, A 205 830 39 03
• Fuel type: Petrol
• Part type: Pipe
• Category: Hoses, Lines & Pipes

Purpose and function in the air conditioning system

The air conditioning hose in the Mercedes W205 model is responsible for transporting refrigerant between system components, maintaining appropriate operating pressure and system tightness. In petrol-powered vehicles, stable air conditioning operation across a wide temperature range is particularly important, which is why a properly selected air conditioning pipe reduces the risk of cooling efficiency drops and unwanted pressure fluctuations.

This element from the Lines, hoses and pipes group is structurally matched to the geometry of the W205 engine bay, which facilitates installation while maintaining the required bending radii and distances from hot components.

Benefits of using an original hose

Using an air conditioning hose dedicated to a specific generation of Mercedes allows for maintaining system performance parameters in accordance with the manufacturer's specifications. Key advantages include:

• factory fitment to mounts and brackets in the W205 body,
• properly selected diameter and internal cross-section for petrol systems,
• stable routing of the refrigerant under typical operating conditions,
• reduction of the risk of leaks resulting from stress or twisting of the hose.

As a result, the air conditioning system can maintain proper operating pressures, which promotes even cabin cooling and improves the durability of the compressor and other components.

Technical characteristics and compatibility with petrol engines

The hose has been designed for vehicles powered by petrol fuel, where the temperature distribution in the engine bay and the operating characteristics of the power unit differ from diesel versions. Properly selected materials and the construction of the hose help to limit the impact of vibrations and temperature changes on the system's tightness.

The element is part of the factory architecture of the Mercedes air conditioning system, which facilitates service and diagnostics – the mechanic can use the manufacturer's documentation, and installation is carried out based on original mounting points, without the need for system modifications.

Condition, installation and service application

The offered air conditioning hose is a used component, which allows for economical system repair while maintaining the original design specification. This type of part is particularly useful in situations where mechanical damage to the existing hose has occurred, e.g., as a result of a collision or localized corrosion.

During installation, it is recommended to:

• check the condition of seals and use new O-rings in accordance with the manufacturer's guidelines,
• thoroughly clean the connection ports before tightening the fittings,
• perform a leak test and properly fill the system with refrigerant.

Such an approach allows for restoring stable air conditioning operation and minimizing the risk of recurring leaks.

System expansion and selection of other components

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

When selecting used drivetrain or accessory components, it is worth following reliable technical knowledge and identification procedures based on manufacturer markings – practical tips, examples, and a discussion of the most common myths can be found in the article Why it is worth buying used gearboxes and engines – facts instead of myths.