Fuel Tank Pipes Mercedes W164 W251 OM642 Diesel Fuel Lines A6420700532

Fuel Tank Pipes Mercedes W164 W251 OM642 Diesel Fuel Lines is an original fuel system component designed for OM642 diesel engines in Mercedes SUV and VAN class vehicles. As part of the Fuel tanks group, it is responsible for the safe and stable routing of fuel in the front section of the vehicle, ensuring the proper operation of the power unit. This used OEM component is a sensible choice for drivers looking for a technically matched solution at an attractive price.

Specifications and technical data

• SKU: A6420700532-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420700532
• Substitutable numbers: A6420700532, A 642 070 05 32
• Location on the vehicle: Front
• Fuel type: Diesel
• Category: Fuel Tanks

Purpose and function in the fuel system

The fuel line in this Mercedes model operates in the front area of the body, in the immediate vicinity of the diesel engine. Its task is to precisely route diesel fuel between the fuel system components, while maintaining the appropriate operating pressure and connection tightness.

Thanks to its design tailored to the OM642 unit, the line maintains the correct routing geometry, which reduces stress, the risk of abrasion, and unwanted vibrations. This is particularly important in diesel engines, where the fuel system operates under increased load and requires stable, leak-proof connections.

Benefits of using an original fuel line

Using an original fuel line in a Mercedes W164 or W251 translates into a number of practical advantages:

• secure fit to the OM642 engine fuel system without the need for modifications,
• preservation of the factory routing of the line in the engine bay,
• reduction of the risk of leaks and diesel fuel seepage,
• stable operation of the fuel system under typical operating conditions.

For the user, this means more predictable power unit performance, easier diagnostics of potential faults, and the ability to maintain the vehicle in a configuration close to the factory standard. In the case of diesel engines, this has a direct impact on engine refinement, fuel consumption, and the durability of other system components.

Installation characteristics and area of application

The line has been designed to work in the front zone of the vehicle, surrounding the diesel engine. The mounting system and shape are adapted to the factory mounting points on the body and the power unit, which facilitates installation and service. The mechanic can carry out the replacement without the need to modify the fuel system, which shortens repair time and reduces the risk of installation errors.

As an element from the Fuel tanks category, the line works with other fuel system components, such as the tank, pumps, and filters, creating a coherent, leak-proof fuel flow path from the rear of the vehicle to the engine.

Part condition and operational aspects

The offered fuel line is a used component, which in practice means a beneficial combination of original build quality and a lower purchase cost compared to a new part. For many Mercedes W164 and W251 users, this is an effective way to restore the efficiency of the fuel system while maintaining compliance with factory specifications.

During installation, standard service procedures are recommended: checking for leaks after starting the engine, verifying the correct routing of the line, and inspecting the condition of adjacent fuel system components. This approach allows for maximizing the potential of the part and limiting the risk of subsequent leaks.

Technical support, selection, and additional materials

To correctly select a fuel line for a specific version of a Mercedes with a diesel engine, it is worth using the OEM number and vehicle data. A detailed discussion of how the fuel system works, along with practical tips on diagnostics, selection by VIN, and regeneration, can be found in the article: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

If you want to better understand why original, even used, fuel system components are often a better choice than replacements of unknown origin, the following material will be helpful: Quality assurance and OEM safety – why used original car parts are the best choice for your car?.

If you are planning a comprehensive repair or upgrade of the fuel system area in your Mercedes and need other elements from the same group, such as lines, connectors, or mounting elements, check the available parts in the Mercedes fuel tanks category.