Fuel Line Mercedes W164 Diesel OM642 Fuel Feed Return Pipe Hose A6420705532

Mercedes W164 Diesel OM642 Engine Compartment Fuel Lines A6420705532 is an original set of lines from the Lines, Hoses, and Tubes group, designed for the fuel system of the OM642 diesel engine in Mercedes W164 models. The component is designed for stable fuel delivery within the engine compartment, maintaining factory safety and sealing standards. This makes it a precise service solution for users seeking compliance with the manufacturer's design.

Specifications and technical data

• SKU: A6420705532-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420702732
• Substitutable numbers: A6420702732, A 642 070 27 32, A6420781981, A 642 078 19 81, A6420782081, A 642 078 20 81
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and Function in the Fuel System

The engine compartment fuel lines set, specifically for the Diesel OM642 unit, is responsible for controlled fuel delivery within the engine, maintaining the correct working pressure. The design tailored for the Mercedes W164 allows for proper routing of fuel lines relative to engine accessories, which reduces the risk of chafing, leaks, and improper line positioning.

The OEM solution ensures:

• maintenance of the factory routing of lines in the engine compartment,
• proper fitment to structural mounts and brackets,
• compatibility with the diesel engine's fuel system.

Compatibility and Reference Numbers

The fuel lines have been developed specifically for Mercedes vehicles with the OM642 diesel engine in the W164 body, facilitating part selection based on factory service documentation. The component has a dedicated OEM part number and associated replacement numbers, allowing for verification of compatibility with a specific vehicle configuration and production year.

If you have doubts when selecting a part by OEM number or reference numbers, it is worth consulting the practical tips in the article Guide: How to Select the Right Car Part by VIN and OEM Number, which describes the step-by-step process of checking part compatibility with a specific vehicle.

Technical Characteristics and Product Group

The product belongs to the Lines, Hoses, and Tubes group, which are components responsible for transporting working fluids in a vehicle. In this case, these are fuel lines operating in the diesel engine's fuel system, adapted to the conditions in the engine compartment – variable temperatures, vibrations, and mechanical loads resulting from the engine's operation.

Original Mercedes origin promotes consistency with other fuel system components, which is particularly important in diesel engines, where stable pressure and line sealing directly impact engine running smoothness and the proper functioning of the injection system.

Component Condition and Service Application

The offered set of fuel lines is a used component, making it an attractive service solution for users seeking a factory part within a reasonable budget. Replacing the lines in the engine compartment is recommended in cases of leaks, signs of corrosion, mechanical damage, or after modifications to accessories that may have affected the original routing of the fuel lines.

Selecting lines dedicated to a specific model and fuel type reduces the risk of installation problems and minimizes the time required for fitting the component during workshop operations.

System Expansion – Related Components

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

Combining correctly selected fuel lines with other fuel system components helps maintain stable operating parameters of the diesel engine, which translates to proper fuel dosage, smooth engine operation, and predictable vehicle behavior in daily use.