Fuel Filter Pump Mercedes W204 W212 OM642 Diesel Pipe Line + Sensor A6420706181

Fuel Filter Pump Mercedes W204 W212 OM642 Diesel Pipe Line + Sensor is a specialized fuel system component designed for OM642 diesel engines in C-Class and E-Class models. This factory-spec pipe ensures stable fuel delivery between the filter and other components, which translates into safe engine operation and predictable behavior of the injection system. Thanks to a design compliant with manufacturer standards, this is a particularly beneficial solution for service repairs and restoring the original fuel system configuration.

Specifications and technical data

• SKU: A6420706181-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420706181
• Substitutable numbers: A6420706181, A 642 070 61 81, A6420702281, A 642 070 22 81
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The described fuel filter pipe is a component from the Lines, hoses, and tubes group, responsible for the precise routing of diesel fuel in the engine. Its task is to maintain tightness and proper fuel flow between the filter and other sub-assemblies, which is essential for correct system pressure and stable injector operation.

In diesel engines, even minor leaks in the lines can cause air ingress, starting problems, power loss, or unstable idle. Using a pipe designed specifically for the OM642 unit helps minimize the risk of such issues and maintain performance parameters at the level intended by the manufacturer.

Benefits of using an original pipe

Using a fuel filter pipe that complies with factory specifications in Mercedes C-Class (W204) and E-Class (W212) diesel models offers a number of practical benefits:

• proper fitment to connectors and mounts in the engine bay,
• maintenance of the correct pipe routing, which limits stress and the risk of abrasion,
• stable fuel flow under varying engine load conditions,
• easier diagnostics and maintenance due to the preservation of the original piping layout.

For users of OM642 diesel engines, this means more predictable operation and a lower risk of unplanned downtime resulting from fuel supply issues.

Technical characteristics and installation

The fuel filter pipe has been designed for operation in a diesel fuel system, where there are specific requirements regarding pressure resistance, temperature, and the chemical properties of the fuel. The pipe design is adapted to the geometry of the OM642 engine bay, which facilitates installation and allows for the preservation of the factory fuel line routing.

In service practice, a pipe of this type is installed in place of a worn or damaged component, paying attention to:

• correct seating on the fuel filter connectors and other system components,
• absence of twists and kinks along the entire length of the pipe,
• leak check after the first engine start.

This approach allows for maintaining stable fuel system operation and limiting the risk of repeated service interventions.

Application in Mercedes vehicles with OM642 engine

The fuel filter pipe is intended for use in Mercedes C-Class W204 and E-Class W212 vehicles equipped with the OM642 diesel unit. Using a component from the same design group as the original equipment facilitates maintaining the consistency of the entire fuel system and is particularly recommended for repairs performed in accordance with the manufacturer's guidelines.

In the case of diesel engines, where the precision of fuel dosing is crucial for performance and exhaust emissions, a properly selected fuel filter pipe is an important part of the entire system. Proper fuel routing helps limit the risk of interference in injector operation and supports maintaining smooth engine performance across the full load range.

Condition and service application

The offered pipe is a used component, which makes it an attractive solution for repairs where maintaining the original specification while optimizing costs is important. Such components are often chosen by workshops specializing in the Mercedes brand when the priority is matching the specific model and engine rather than using random aftermarket replacements.

When replacing the fuel filter pipe, it is worth simultaneously checking the condition of other fuel system components, such as other fuel lines, mounts, or the filter itself, to restore the full efficiency of the entire fuel path in one service operation.

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

Additionally, if you are interested in the broader context of selecting used powertrain components and want to better understand when it is worth choosing original OEM parts from dismantling, read the article on the advantages of used OEM components over unreliable replacements.