Mercedes W169 W245 Diesel OM640 Fuel Injector Rail Line A6400702395

The Mercedes W169 W245 Diesel OM640 Fuel Rail is a fuel system component designed for diesel engines, used in the compact Mercedes A-Class and B-Class models. It is responsible for the stable distribution of fuel to the injectors, which directly impacts the engine's running smoothness and combustion parameters.

Specifications and technical data

• SKU: A6400702395-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6400702395
• Substitutable numbers: A6400702395, A 640 070 23 95
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Fuel Injectors

Purpose and Role in the Injection System

The fuel rail in the Diesel OM640 engine functions as a high-pressure manifold that supplies individual injector nozzles. A correctly selected fuel rail ensures:

• stable fuel pressure across the entire engine load range,
• uniform supply to all cylinders, which reduces vibrations and uneven engine operation,
• better control of the combustion process, contributing to lower fuel consumption and reduced smoke.

The component is mounted at the front of the engine bay, in close proximity to the injectors, which facilitates the routing of high-pressure lines and system servicing.

Construction and Compatibility with OM640 Engine

The fuel rail has been specifically designed to meet the requirements of the OM640 Diesel unit, taking into account the characteristics of the common rail system. The appropriate geometry and arrangement of connection ports enable:

• precise fit with factory equipment in Mercedes W169 and W245 models,
• correct routing of high-pressure lines without stress or twisting,
• maintenance of the system's factory rigidity, which reduces vibrations and the risk of leaks.

Thanks to its construction aligned with the manufacturer's solutions, the fuel rail works with factory injector nozzles, maintaining the parameters intended for this type of engine.

Benefits of Using the Correct Fuel Rail

A correctly selected fuel rail in a diesel system translates into a number of practical operational benefits:

• stable engine operation at idle and under load, without characteristic jerks and misfires,
• more predictable throttle response, which improves driving comfort in city traffic and on the road,
• reduced risk of overflows and leaks within the fuel manifold,
• better operating conditions for injectors, which can positively impact their durability.

If problems with the injection system arise, such as starting difficulties, loss of power, or excessive smoking, it is advisable to diagnose the entire manifold, including the fuel rail.

Component Condition and Service Application

The offered fuel rail is a component from the Injector Nozzles category, intended for service applications in Mercedes A-Class (W169) and B-Class (W245) vehicles with diesel engines. It can be used for fuel system repairs as well as for comprehensive engine component regeneration when restoring the correct operating parameters of the common rail system is required.

Diagnostics and Technical Knowledge

When experiencing fuel system issues, it is beneficial to be aware of the typical symptoms of damage to injectors and associated components. Detailed information on symptoms, consequences, and testing methods can be found in the article: Diesel Injector Faults – How to Recognize Them and What Neglecting Them Entails. This is a practical source of knowledge that helps to better assess the condition of the entire injection system before replacing the fuel rail.

Related Products from the Same Category

If you are also looking for other components from the Mercedes Injector Nozzles category for your car, check out the Mercedes Injector Nozzles available in our store to complete your entire fuel system using compatible components.