Mercedes C204 Oil Pump Oil Inlet Feed Pipe Line Hose M156 Petrol A1561801120

Mercedes C204 Oil Pump Oil Inlet Feed Pipe Line Hose M156 is a specialized lubrication system component designed for this series of petrol engines. It is responsible for the precise delivery of oil to the pump, which is crucial for the durability of the power unit and stable operating parameters. By maintaining factory geometry and flow diameters, the pipe ensures correct oil pressure under demanding operating conditions.

Specifications and technical data

• SKU: A1561801120
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1561801120
• Substitutable numbers: A1561801120, A 156 180 11 20, A 156 180 22 20, A1561802220, A 156 180 30 20, A1561803020, A 156 180 42 20, A1561804220, A 156 180 52 20, A1561805220
• Fuel type: Petrol
• Category: Oil Pumps & Parts

Purpose and function in the lubrication system

The oil pump oil inlet feed pipe in the M156 engine is responsible for transporting the lubricating medium between key sections of the system. In high-power petrol units such as the M156, a stable supply to the oil pump is essential to maintain an adequate oil film on moving parts. A properly selected pipe:

• ensures proper oil flow at high engine speeds,
• minimizes pressure drops at critical points in the system,
• reduces the risk of insufficient lubrication of bearings, the crankshaft, and the timing system,
• supports stable oil pump operation across the full range of operating temperatures.

Benefits of using an original oil pipe

Using an oil pipe dedicated to a specific power unit allows for the maintenance of parameters specified by Mercedes engineers. This component has appropriately selected rigidity, internal diameter, and shape, which limits flow turbulence and unwanted mechanical stress. The main advantages include:

• Factory fit for the M156 engine – no need for modifications or adaptations.
• Stable oil pump operating conditions, especially during dynamic driving.
• Reduced risk of leaks compared to universal components.
• Better repeatability of oil pressure parameters over a long period of operation.

Technical and operational characteristics

The pipe has been designed for operation in a petrol engine lubrication system, where high temperatures and variable pressure loads occur. The design of the pipe takes into account:

• resistance to long-term contact with engine oil,
• shape retention during temperature and pressure changes,
• the ability for direct installation in factory mounting points. As a result, the component performs well both in daily use and in more demanding conditions, where the engine operates at higher RPM ranges. Stable oil flow translates into less wear on cooperating components and more predictable behavior of the power unit.

Component condition and service application

The offered oil pipe comes from a group of used parts, which allows for an economical repair of the lubrication system while maintaining the original design specification. This is a particularly beneficial solution when servicing high-performance units, where it is important to maintain compliance with factory design assumptions. The component will prove useful, among other things, for:

• lubrication system repairs after an oil pump failure,
• engine overhauls when disassembly and reassembly of oil lines are required,
• preventive replacement of components prone to wear in high-power petrol engines.

Compatibility and part group

The oil pipe belongs to the Oil pumps and parts group, which means it works directly with the oil pump and other lubrication system components. Thanks to its assignment to this category, it is easier to select other components necessary for a comprehensive service of the power unit. If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as pump housings, oil pickups, or additional feed lines, check the available parts in the Mercedes oil pumps and parts category.

Technical support and knowledge about parts

When working with advanced power units, it is worth relying on verified information regarding design and component selection. To expand your knowledge about solutions used by manufacturers and the importance of original powertrain components, you can use guide materials, such as an article on design differences and OEM part selection: Classic Mini vs modern MINI – how the design has changed and which original Mini parts help preserve their character. If you are interested in a broader context of technology development at Mercedes, including changes in design and service approaches across subsequent model generations, the following overview material may also be helpful: Evolution of the Mercedes S-Class: from W140 to W222 – innovations, model differences, and Mercedes auto parts over the years.