Fuel Pressure Pipe Mercedes W169 W245 OM640 Injection Line Rail A6400700833

Mercedes W204 OM642 Diesel Fuel Injector Line is an original fuel system component designed for OM642 diesel engines used in Mercedes W204 models. This specialized line, part of the Lines, Hoses, and Tubes group, is responsible for precisely delivering fuel to the injector, directly impacting the engine's smooth operation and combustion stability. Thanks to its factory-engineered geometry and fit for the specific engine configuration, it ensures proper fuel flow under the demanding conditions of a diesel engine.

Specifications and technical data

• SKU: A6400700833
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400700833
• Substitutable numbers: A6400700833, A 640 070 08 33
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and Function in the Fuel System

The fuel injector line for the OM642 engine in the Mercedes W204 operates within the high-pressure environment typical of modern Diesel engines. Its task is to provide stable, leak-free, and directed fuel delivery to the injector, maintaining appropriate rigidity and resistance to vibrations generated by the V6 engine. A correctly selected line minimizes the risk of micro-leaks, pressure drops, and improper fuel atomization, resulting in smooth engine operation, proper throttle response, and adherence to factory emission standards.

Benefits of Using an Original Mercedes Line

Using a line dedicated to a specific W204 configuration with an OM642 engine preserves the factory fuel system routing. The original geometry and mounting points facilitate installation and minimize stress on the system, which is particularly important under high operating pressure. In practice, this means:

• correct routing of the line relative to the engine head and accessories,
• reduced risk of rubbing against other components and resulting wear,
• maintenance of stable fuel pressure at the injector,
• improved injector repeatability across the entire load range.

For the user, this translates into more predictable vehicle behavior, easier diagnostics, and the ability to maintain consistency with the manufacturer's service documentation.

Technical Characteristics and Compatibility

The line has been designed with the specific requirements of Mercedes diesel engines in mind, where the injection system operates under significant thermal and pressure loads. The line's construction accounts for:

• resistance to Diesel fuel and performance additives,
• operation in elevated engine bay temperatures,
• resistance to torsional stress and vibrations characteristic of V6 engines,
• precise ends ensuring a leak-free connection with injection system components.

As a result, the line can be used as a replacement part in standard service procedures without requiring modifications to the fuel system. Maintaining compliance with factory specifications is crucial for the proper functioning of the common rail system and for operational safety.

Condition, Verification, and Service Application

The offered line is a used part from a dismantled vehicle, allowing for an economical repair of the fuel system while maintaining original manufacturing quality. This type of component is particularly useful in situations where a single section of the fuel line needs replacement due to mechanical damage, external corrosion, or interference with engine accessories. Replacing the line with an original equivalent helps restore system integrity, reduce the risk of air ingress, and ensure stable operating conditions for the injector.

Support with Selection and Scope of Work Expansion

When selecting a fuel injector line for the Mercedes W204 with an OM642 engine, it is crucial to compare its shape, length, and end fittings with the part installed in the vehicle, as well as verify compatibility with the manufacturer's documentation. If expanding the scope of service work within the fuel system, it is also advisable to inspect other sections of the system, injectors, and mounting components to prevent recurrence of the fault.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other parts from the same group, such as additional supply lines, fuel return sections, or flexible connecting hoses, check the available parts in the Mercedes Lines, Hoses, and Tubes category.