Mercedes W639 W906 OM646 Pressure Pipe Fuel Injection Line Rail A6460700333

Mercedes W639 W906 OM646 Pressure Pipe Fuel Injection Line Rail is a component from the Lines, hoses and pipes category, designed for the diesel engine fuel supply system. It enables precise delivery of diesel fuel to the injection system, supporting the stable operation of the OM646 power unit in W906 series models.

Specifications and technical data

• SKU: A6460700333
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6460700333
• Substitutable numbers: A6460700333, A 646 070 03 33, BG
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel supply system

The offered fuel line is dedicated to the OM646 diesel engine in the Mercedes W906 and operates within the injection supply area. Its task is to safely route fuel at the appropriate pressure between system components, ensuring that the injectors receive a stable dose of fuel under various load conditions.

A properly selected injection line reduces the risk of leaks, pressure drops, and starting problems, which translates into smooth diesel engine operation and predictable throttle response.

Technical characteristics and compatibility

The line belongs to the Lines, hoses and pipes group, meaning it has been designed to operate in a fuel environment, taking into account the typical thermal and pressure loads for diesel units. The construction is adapted to the specifics of the injection system in the OM646 engine, ensuring the component maintains the correct mounting geometry and routing relative to other components under the hood.

The product is intended for diesel-powered systems, ensuring material compatibility with fuel and additives used in modern diesel engines. Such a fit reduces line wear and minimizes the risk of micro-cracks or degradation of the internal flow surface.

Component condition and service application

The offered line is a used component, making it an attractive solution for service repairs where the priority is rational vehicle maintenance costs while maintaining compliance with the factory design. This type of part is suitable both for replacing a damaged line and for staged regeneration of the injection system in the Mercedes W906.

Replacing the fuel line is recommended in situations where there are signs of leaks, the smell of fuel in the engine compartment, starting problems, or unstable engine operation. Using a line matched to the specific diesel engine facilitates installation and allows for maintaining the original routing of the fuel system.

Benefits of using the injection line in the Mercedes W906

• Maintaining proper fuel flow in the diesel engine injection system.
• Improved stability of the OM646 unit thanks to correct supply pressure.
• Reduced risk of fuel leaks and associated operational failures.
• Possibility of economical fuel system repair while maintaining compliance with Mercedes design.

A fuel line selected in this way supports safe and predictable operation of the injection system, which is important both in intensively used commercial vehicles and in cars operating in mixed urban and extra-urban cycles.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as supply lines, return hoses, or fuel pipes, check the available parts in the Lines, hoses and pipes Mercedes category.

For drivers interested in optimizing vehicle maintenance costs, it is also worth checking out the advice on economical operation – practical tips can be found in the article Economical operation of a Ford – where to look for the biggest savings in mechanical and body repairs, which shows how reasonable part selection can translate into real savings for other brands as well.