Mercedes W211 M112 Fuel Distributor Rail Injector Pressure Pipe A1120700595

The Mercedes W211 M112 fuel rail is an original component of the diesel engine fuel system, designed for precise fuel distribution to the injector nozzles. This used OEM part ensures proper fuel rail pressure, which translates to stable engine operation and correct injection characteristics in Mercedes diesel engines.

Specifications and technical data

• SKU: A1120700295-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1120700295
• Substitutable numbers: A1120700295, A 112 070 02 95, A1120700595, A 112 070 05 95
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

The fuel rail for Mercedes W211 with an M112 diesel engine is a key element of the common rail system. It is responsible for uniformly distributing fuel at the correct pressure to individual injector nozzles, enabling proper fuel metering and stable engine operation across the full load range.

A correctly selected fuel rail helps maintain:

• uniform supply to all cylinders, which reduces vibrations and uneven engine operation,
• correct combustion parameters, contributing to lower fuel consumption,
• stable system pressure, essential for the proper operation of diesel injector nozzles.

Benefits of Using an Original Fuel Rail

Choosing an original fuel rail from the injector nozzles category for Mercedes allows you to maintain the factory operating parameters of the fuel system. The OEM component is structurally matched to the specific engine configuration, ensuring that it:

• fits factory mounting points and the existing fuel system,
• works with standard injector nozzles and common rail system accessories,
• reduces the risk of leaks and fuel rail pressure drops.

A used fuel rail is a solution that can reduce repair costs while maintaining a design consistent with the manufacturer's original project.

Component Condition and Installation Aspects

The offered fuel rail is a used part intended for reinstallation in a diesel engine fuel system. Before installation, a standard workshop procedure is recommended, including checking system tightness, cleanliness of fuel lines, and the condition of injector nozzles, to fully utilize the component's potential.

Professional installation of the fuel rail, combined with proper injection system diagnostics, can reduce the risk of:

• engine starting difficulties resulting from incorrect fuel pressure,
• loss of power and dynamics caused by fuel metering disruptions,
• excessive smoking due to improper injector nozzle operation.

Diesel Injection System Diagnostics

When replacing the fuel rail in a diesel engine, it is also advisable to assess the condition of the injector nozzles themselves and the entire common rail system. Typical symptoms of injection problems include uneven idling, increased fuel consumption, or a decrease in engine smoothness. A detailed discussion of symptoms and potential consequences of neglect can be found in the article: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails.

Related Mercedes Injector Nozzles

If you plan to replace other components during fuel system service, check out the Mercedes injector nozzles available in our store. The full offer for this category can be found here: Mercedes injector nozzles, which will help you select compatible components for your injection system.

For workshops and users who want to minimize vehicle downtime, information on the advantages of using readily available used OEM parts may be useful – you can read more about this in the material: Availability of Used OEM Parts and Repair Time in the Workshop.