Fuel Line Mercedes W639 W906 Diesel OM646 Hose Injection System A6460781381

Mercedes W639 W906 Diesel OM646 Fuel Line Hose A6460781381 is an original fuel system component designed for OM646 diesel engines in Mercedes Vito/Viano W639 and Sprinter W906 models. The precisely selected diameter and construction of the line ensure stable fuel delivery under the demanding operating conditions of a diesel engine. By using a component from the Lines, Hoses, and Tubes group, you maintain the factory characteristics of the fuel system's operation.

Specifications and technical data

• SKU: A6460781381-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6460781381
• Substitutable numbers: A6460781381, A 646 078 13 81, KD
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and Function in the Fuel System

The presented fuel line is a working element of the Diesel engine's fuel supply system, responsible for safe and leak-free fuel delivery between individual components. In OM646 units, stable pressure and correct diesel fuel flow directly impact the engine's running smoothness, ease of starting, and reduce the risk of air entering the system.

Selecting a line dedicated to a specific engine family and body type (W639, W906) allows for maintaining:

• proper routing of the fuel line relative to engine accessories,
• adequate flexibility during engine operation on its mounts,
• reduction of vibrations transmitted to the system's spigots and connectors.

Benefits of Using an Original Mercedes Line

Using a fuel line from the Mercedes offering allows for maintaining the consistency of the entire fuel system with the vehicle's factory technical documentation. This means:

• maintaining internal diameter and flow characteristics consistent with the design,
• correct fit with standard brackets, clamps, and guides,
• reducing the risk of leaks resulting from improper line routing.

For OM646 diesel engines, often operating under heavy load, the correct fuel line helps maintain stable supply parameters, which translates to uniform injector operation and consistent fuel doses.

Performance Characteristics and Installation

This element belongs to the Lines, Hoses, and Tubes group, meaning it is designed for operation in environments exposed to temperature changes, vibrations, and contact with diesel fuel. The line's construction promotes:

• maintaining seal integrity after proper crimping or connection to factory fittings,
• resistance to typical operational loads in the engine bay,
• easier installation in original mounting points.

Before installation, it is recommended to verify the fuel line's routing in the vehicle and check the condition of other system components, such as filters, quick-connect fittings, or brackets, to avoid stressing or twisting the line after installation.

Item Condition and Service Application

The offered fuel line is a used component, making it a service solution for users seeking original parts with a reasonable cost-to-functionality ratio. This type of element is suitable for both spot replacement of a damaged section of the fuel system and for broader service work related to diesel engine maintenance.

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 lines, flexible hoses, or rigid supply tubes, check the available parts in the Mercedes Lines, Hoses, and Tubes category.

Technical Support and Engine Accessory Knowledge

When working on the fuel system and engine accessories, it is advisable to use reliable sources of knowledge regarding the specifics of Mercedes units. Additional information on the operation and maintenance of accessories in popular Mercedes-Benz C-Class and E-Class models can be found in the article Reliability under the star – how to care for engine accessories in popular Mercedes-Benz C-Class and E-Class models?, which discusses practical aspects of component selection and servicing.