Mercedes W447 Air Conditioning Refrigerant Pipe Hose A4478304901

Mercedes W447 Air Conditioning Refrigerant Pipe Hose is an original cabin cooling system component designed for use in Mercedes vehicles. Its precise geometry and factory-fitted connectors ensure leak-free refrigerant flow and stable operation of the compressor and other air conditioning components.

Specifications and technical data

• SKU: A4478304901
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A4478304901
• Substitutable numbers: A4478304901, A 447 830 49 01
• Category: A/C Hoses & Fittings

Technical characteristics of the air conditioning pipe

The presented hose belongs to the Air conditioning pipes, hoses and connectors category, meaning it is responsible for the safe transport of refrigerant within the A/C system. The hose construction is based on a flexible working section and precisely formed ends that work with the factory ports and valve blocks in the W447 body.

A properly selected inner diameter and appropriate wall stiffness reduce pressure drops and minimize the risk of vibrations that could lead to micro-cracks or leaks. The connectors used are adapted to operate under the high working pressures typical of air conditioning systems in modern Mercedes vehicles.

Role in the Mercedes W447 air conditioning system

In an air conditioning system, every pipe performs a strictly defined function – it transports refrigerant from one component to another while maintaining appropriate flow parameters. In the case of the W447 body, a properly selected hose translates into:

• maintaining stable pressure in the refrigerant circuit,
• reducing compressor efficiency losses,
• efficient evaporator cooling and uniform temperature reduction in the cabin,
• reducing the load on other A/C system components.

By using an original hose dedicated to the W447, you can avoid problems with mismatched lengths, geometry, or connector types, which often occur with universal replacements.

Benefits of using an original Mercedes pipe

Choosing a used, original air conditioning pipe for a Mercedes is a solution that combines economic aspects with the preservation of the system's factory operating parameters. A part sourced from the dismantling of a vehicle of the same brand ensures:

• compliance with the factory air conditioning system specification,
• correct positioning relative to the body and other components,
• possibility of installation without system modifications,
• reduced risk of leaks resulting from inaccurate fitting.

This approach is particularly beneficial when servicing fleet or heavily used vehicles, where quick, predictable repairs and maintaining compatibility with factory equipment are essential.

Component condition and service application

The offered air conditioning pipe is a used component, which in practice means it comes from dismantling and has been verified for suitability for further use. This type of part is suitable both for typical replacement of a damaged pipe after a leak and for post-accident repairs when it is necessary to restore the A/C system routing in the engine compartment or along the body.

Due to its factory origin, the pipe is intended for installation in Mercedes vehicles from the W447 family, which facilitates workshop work and shortens service time – there is no need to adjust lengths or modify mounts.

Expansion and service of the Mercedes air conditioning system

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 additional pipes, flexible hoses, or service connectors, check the available parts in the Mercedes air conditioning pipes, hoses and connectors category.

When selecting used components for a Mercedes, it is worth being guided not only by price but above all by origin and compliance with factory specifications. More practical tips on the safe use of dismantled components can be found in the article Used parts for Mercedes – original parts from dismantling, which discusses, among other things, the selection of air conditioning system components and other comfort systems.