Fuel Rail Mercedes W164 W207 W212 OM642 Injector Pressure Line Right O/S

Fuel Rail Mercedes W164 W207 W212 OM642 Injector Pressure Line Right O/S is an original diesel engine fuel system component, designed for installation on the right side of the power unit. Thanks to its factory-spec geometry and precise fit for the OM642 engine, it ensures stable fuel delivery to the injectors and proper operation of the entire common rail system.

Specifications and technical data

• SKU: A6420703095-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420703095
• Substitutable numbers: A6420703095, A 642 070 30 95
• Location on the vehicle: Right
• Category: Fuel Injectors

Purpose and function in the injection system

The described fuel rail with the right-side injector line operates within the high-pressure fuel circuit, connecting the common rail to the injectors in the OM642 engine. It is responsible for:

• precise fuel delivery to the injectors on the right side of the engine,
• maintaining system integrity under high operating pressure,
• stable injection performance across a wide range of engine loads.

By maintaining the original design, this component allows for seamless integration with the factory fuel system in Mercedes W164, W207, and W212 models.

Compatibility with the OM642 engine

The fuel rail with the line has been designed specifically for the OM642 unit, which ensures a perfect match in terms of connection diameters, shape, line length, and mounting method. In practice, this translates into:

• correct routing of the line on the right side of the engine bay,
• reduction of mechanical stress and vibrations during operation,
• maintenance of proper fuel flow characteristics.

Such compatibility is particularly important in diesel engines, where fuel pressure stability has a direct impact on engine refinement, performance, and exhaust emissions.

Characteristics of the used component

The offered component comes from dismantling and is a used part, which allows for an economical repair of the injection system while maintaining the manufacturer's original specifications. In the case of a fuel rail with an injector line, it is crucial to:

• maintain factory mounting points and the shape of the line,
• avoid non-factory modifications that could affect sealing,
• ensure compatibility with the common rail system used in the specific model.

Using an original pre-owned component allows you to maintain the structural integrity of the fuel system without the need for costly replacement of the entire line set.

The importance of the proper condition of the rail and line

Leaks or damage within the fuel rail and injector line can lead to a drop in fuel pressure, starting problems, rough engine operation, or increased smoke. To better understand the link between the condition of this component and the operation of the entire system, it is worth reading the article Diesel injector faults – how to recognize them and the risks of neglecting them, which discusses typical symptoms and consequences of irregularities in the injection system.

Support with selection and system expansion

If you are planning a comprehensive repair or upgrade of the injection system area in your Mercedes and need other elements from the same group, such as additional lines, rails, or fuel supply components, check out the available parts in the Mercedes Injector Nozzles category.

For those interested in conscious operation and the use of dismantled parts in the context of performance and environmental impact, the guide Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts, which describes a practical approach to selecting used components, may also be helpful.