Mercedes-Benz E W210 M112 240 280 320 Air Conditioning Radiator Suction Pipe

Mercedes-Benz E W210 M112 240 280 320 Air Conditioning Radiator Suction Pipe is an original air conditioning system component designed for installation in the rear part of the vehicle. Thanks to its factory fitment for M112 units, it ensures proper refrigerant flow and stable system operation. Using this component allows for an economical yet technically sound repair without the need to resort to aftermarket replacements with uncertain parameters.

Specifications and technical data

• SKU: A1122303256
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1122303256
• Substitutable numbers: A1122303256, A 112 230 32 56, BG
• Location on the vehicle: Rear
• Category: A/C Hoses & Fittings

Purpose and function in the air conditioning system

The described pipe belongs to the Air conditioning pipes, hoses, and connectors category, responsible for transporting refrigerant within the installation. The component operates in the rear part of the vehicle, where maintaining tightness and the correct flow diameter is crucial for the compressor, condenser, and evaporator to maintain stable operating pressures.

A properly selected pipe reduces pressure drops, minimizes the risk of leaks, and supports uniform cabin cooling, which is particularly important in Mercedes-class vehicles equipped with extensive air conditioning systems.

Benefits of using an original pipe

Using an original pipe in models with M112 engines translates into a number of practical advantages:

• factory fitment to the geometry of the rear body section and the air conditioning system,
• preservation of the flow capacity and characteristics designed by the manufacturer,
• reduced risk of hose tension and twisting during installation,
• easier diagnostics and future service thanks to compliance with technical documentation.

As a result, the pipe can be safely used as a component to restore system efficiency after leaks, connector corrosion, or mechanical damage in the rear part of the vehicle.

Installation and service aspects

The pipe intended for the rear zone of the vehicle requires installation in accordance with service procedures for air conditioning systems, maintaining the correct sequence of venting and refrigerant filling. In practice, this means the necessity of using an air conditioning service station, leak testing, and verifying operating pressures after the work is completed.

The used component allows for reduced repair costs while maintaining the original pipe routing geometry. This is particularly important in areas with limited installation space in the rear of the body, where slight deviations in hose shape can cause rubbing against suspension or body components.

Selecting the pipe for a specific vehicle

To correctly select the pipe for a specific Mercedes W210 with an M112 engine, it is worth verifying the markings in the product's technical specification and comparing the pipe's routing with the factory-installed element. Paying attention to the placement in the rear part of the vehicle helps avoid confusion with other sections of the air conditioning installation.

In case of expansion or a larger scope of cabin cooling system repairs, a good solution is to simultaneously check other pipes, hoses, and connectors to limit the number of future disassemblies and system re-filling.

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

Air conditioning system safety and technical knowledge

When working on air conditioning pipes, it is particularly important to maintain system cleanliness, properly tighten connectors, and check the condition of the compressor. Replacing a pipe in the rear part of the installation often involves the need to assess the condition of the compressor and other components to avoid recurring faults.

For users who want to better understand the relationship between pipe tightness and compressor durability, the guide article Air conditioning compressor – symptoms of failure, causes, and safe replacement, which describes typical failure symptoms and principles of safe system operation, will be helpful.