Mercedes W204 Oil Cooler Power Steering Pipe Hose Line Petrol M156 A2124660481

The Mercedes W204 Power Steering Hose Petrol M156 is an original hydraulic system component designed for Mercedes vehicles with the M156 petrol engine. Designed as part of the factory system, it ensures stable pressure management in the power steering system and correct pump operation under demanding operating conditions.

Specifications and technical data

• SKU: A2124660481
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2124660481
• Substitutable numbers: A2124660481, A 212 466 04 81
• Fuel type: Petrol
• Category: Power Steering Pumps

Purpose and Role in the Power Steering System

The hose described is a working component of the hydraulic power steering system in Mercedes C-Class W204 models with the M156 petrol engine. It is responsible for the controlled flow of the working fluid between components, which translates into smooth operation of the steering gear and appropriate load on the power steering pump.

Thanks to its construction in line with factory standards, the system maintains adequate rigidity, sealing, and resistance to operating pressure, which reduces the risk of power steering performance drops, noise, or uneven steering wheel operation.

Benefits of Using an Original Hose

Using a hose dedicated to the M156 petrol engine allows for maintaining system operating parameters in line with the manufacturer's specifications. In practice, this means:

• correct fluid flow across the entire engine speed range,
• stable pressure in the power steering system,
• reduced risk of leaks and air ingress into the system,
• better cooperation with the factory power steering pump and steering gear.

For the user, this translates into more predictable vehicle handling, comfortable maneuvering, and a reduced risk of failures associated with an improperly selected aftermarket part.

Component Condition and Service Application

The power steering hose is offered as a used part, making it an attractive solution for service repairs where both technical compatibility and cost optimization are important. Replacing the hose is recommended in situations where there are leaks, external corrosion, mechanical damage, or signs of power steering performance degradation.

The component is particularly suitable for vehicles subjected to intensive use, where the power steering system operates under increased load, as well as for comprehensive repairs involving the pump, hoses, and steering gear.

System Integration and Part Selection

The hose has been designed to work with the factory hydraulic system in the Mercedes W204, which facilitates installation and reduces the need for modifications. Proper selection based on engine type (M156 petrol) ensures the correct hose routing geometry, clearances from other components, and safe operation at elevated engine compartment temperatures.

To precisely select the part for a specific vehicle configuration, it is advisable to refer to the OEM number and interchangeable part numbers visible in the technical specifications, as well as the vehicle data (model, year, engine type).

Expansion of Power Steering and Fuel System Service

If you are planning a comprehensive repair or upgrade of the steering system area in your Mercedes and need other components from the same group, such as the pump, pressure hoses, or return hoses, check the available parts in the Mercedes Power Steering Pumps category.

When performing service work on the petrol engine, it is also advisable to ensure the efficiency of the powertrain's fuel supply. Practical tips on diagnostics, selection by OEM number, and operation of fuel system components can be found in the article “Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Reconditioning”, which helps to organize the service process for the entire fuel line in modern cars.