Mercedes W204 Diesel OM642 Fuel Return Leak Line With Bracket A6420780341

Mercedes W204 Diesel OM642 Fuel Return Leak Line With Bracket is a component designed for the organized routing of supply lines in OM642 diesel engines. A properly selected fuel line bracket stabilizes the installation, reduces vibrations, and helps maintain the safe operation of the injection system. This is a practical solution for users who want to maintain factory line routing and proper organization of the engine bay.

Specifications and technical data

• SKU: A6420780341-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420780341
• Substitutable numbers: A6420780341, A 642 078 03 41, A 642 070 55 32, A6420705532, A 642 070 78 32, A6420707832
• Fuel type: Diesel
• Category: Additional Fuel Injection Parts

Purpose and function in the injection system

The fuel line bracket in the OM642 engine is responsible for stable mounting of the supply lines in the diesel unit. A correctly installed component:

• maintains the lines in the position designed by the manufacturer,
• reduces the risk of chafing and damage resulting from vibrations,
• prevents unwanted contact of the lines with hot or moving engine parts,
• supports the maintenance of tightness and proper operation of the injection system.

In the case of diesel engines, precise routing of fuel lines is important for both the durability of components and the smooth operation of the power unit.

Compatibility with the OM642 Diesel engine

The presented bracket has been designed for use in diesel power units from the OM642 family used in Mercedes W204 class models. This means it is matched to the engine geometry, accessory layout, and fuel line routing characteristic of this design.

Thanks to this, the installation process is predictable, and the bracket works with the existing fuel system without the need for line modifications or additional adapters.

Product characteristics and condition

The offered element comes from the Other injection system parts group, which means it plays an auxiliary but important role in organizing the entire fuel supply system. The product is used, which in practice allows for maintaining the original geometry and mounting method consistent with the manufacturer's factory solutions.

Choosing an original fuel line bracket from disassembly is often a reasonable alternative to uncertain replacements, especially where precise fitment to a specific engine and maintaining the factory installation routing are important.

Benefits of using an original fuel line bracket

Using a dedicated bracket in a diesel engine brings a number of practical benefits:

• maintaining fuel lines in an optimal position relative to the fuel rail and accessories,
• reducing mechanical loads acting on connectors and fittings,
• organizing the engine bay, which facilitates service and diagnostics,
• reducing noise resulting from line vibrations.

For users who care about the technical side of operating the OM642 Diesel, this is a simple way to maintain stable and predictable operation of the injection system.

Related components and technical knowledge

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 additional brackets, mounts, or fuel line supports, check the available parts in the Other Mercedes injection system parts category.

When selecting used components, it is worth knowing the differences between original parts, replacements, and parts from disassembly – you will find practical tips in the article Post-accident repair of your car: why are used body parts a better choice than replacements?, which organizes the most important arguments for making an informed choice of used parts.