Fuel Line Mercedes W447 W906 Diesel Fuel Feed Return Pipe Hose A6510700935

Diesel fuel line, supply and return for Mercedes W447 / W906 is an original fuel system component designed for diesel engines. It ensures stable fuel delivery between key system components, supporting the proper operation of the powertrain. Thanks to its factory design, it is a convenient and technically matched solution for Mercedes diesel vehicles.

Specifications and technical data

• SKU: A6510700935-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510700935
• Substitutable numbers: A6510700935, A 651 070 09 35
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the fuel system

The supply and return fuel line in a diesel engine is responsible for safely delivering diesel fuel to the injection rail and its return from the system. For Mercedes commercial vehicle models such as W447 and W906, this component operates under demanding conditions, therefore its correct selection directly impacts:

• fuel system pressure stability,
• uniform injector operation,
• reduction of air ingress risk into the system,
• safe discharge of excess fuel.

A properly selected line from the Lines, hoses, and pipes group helps maintain the correct operation of a diesel engine and supports its durability in daily use.

Compatibility with Mercedes diesel engines

The presented fuel line is designed to work with diesel powertrains used in Mercedes vehicles. This means its geometry, connection diameters, and routing are adapted to the factory layout in the engine bay, without the need for modifications or forced fitting.

This allows the component to be used for both standard replacement of a worn line and for fuel system repairs, where maintaining the original fuel routing and connection tightness is crucial.

Characteristics of a used part

The offered fuel line is a used part, which in practice means the possibility of obtaining a factory component at a more favorable price than a new replacement. For many Mercedes owners, especially in fleet or commercial applications, this is a reasonable compromise between repair cost and maintaining the original fuel system design.

Choosing an original part from a dismantled vehicle allows for proper fitment with the vehicle's mounts, brackets, and connectors, which facilitates installation and reduces the risk of leaks resulting from imprecise fitting.

Benefits of using an original fuel line

Using a factory supply and return line in a Mercedes diesel engine offers a number of practical benefits:

• Replication of factory fuel routing – the line is routed according to the manufacturer's design, maintaining appropriate bending radii and mounting points.
• Proper cooperation with other system components – injection rail, injectors, fuel filter, and high-pressure pump.
• Reduced risk of leaks due to precisely fitted connectors and connection ends.
• Ability to restore proper fuel system operation after a malfunction or line leak.

For users of commercial vehicles, it is particularly important that a functional fuel line helps maintain stable engine operation with high mileage and intensive use.

Support for selection and further system expansion

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, return hoses, or fuel pipes, check the available parts in the category Mercedes Lines, hoses, and pipes.

When choosing a used fuel line, it is also worth paying attention to the general principles of selecting second-hand parts – issues of tightness, compatibility, and quality of workmanship. An extended discussion of common mistakes when purchasing components for modifications and repairs can be found in the article Buying used car parts – common mistakes when choosing parts for tuning, which may also be helpful when planning work on the fuel system.