Mercedes C218 Injection Pressure Line Tube Hose Pipe Set A6420700633

Mercedes C218 Injection Pressure Line Tube Hose Pipe Set is a specialized set of components designed for diesel engine fuel systems, compatible with the brand's High-pressure fuel pumps. The set ensures precise delivery of high-pressure fuel to the injectors, which directly impacts the engine's performance and combustion stability. This used OEM component is a solution for users looking for a technically compatible part while maintaining reasonable maintenance costs.

Specifications and technical data

• SKU: A6420700633
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420700633
• Substitutable numbers: A6420700633, A 642 070 06 33
• Category: High Pressure Fuel Pumps

Purpose and function in the fuel system

The Mercedes C218 Injection Pressure Line Tube Hose Pipe Set is responsible for transporting fuel from the pump's delivery section to the individual injectors in the engine. The component operates under high working pressures, which is why its construction must ensure tightness, resistance to pressure pulsations, and dimensional stability across a wide temperature range. A properly selected set of lines reduces the risk of pressure drops, uneven engine operation, and starting difficulties in both hot and cold conditions.

Set construction and benefits of use

The presented set of lines has been designed as a component compatible with the factory Mercedes injection system, which translates into proper routing of fuel lines relative to the cylinder head, pump, and engine accessories. Properly shaped line sections minimize installation stress, reduce vibrations, and limit the possibility of contact with hot or moving engine components.

Using an original solution to replace faulty or leaking lines allows you to:

• restore stable pressure in the injector supply rail,
• reduce the risk of fuel leaks in the engine compartment,
• maintain correct injection quantities across the entire load range,
• limit additional loads on the high-pressure pump resulting from leaks.

Selection by numbers and compatibility

Due to the specifics of common rail systems in Mercedes vehicles, the selection of the appropriate set of pressure lines should be based on catalog data, OEM numbering, and the configuration of the specific engine unit. Proper fitment guarantees the compatibility of the line geometry with the layout of the pump and injector ports, which facilitates installation and reduces the risk of stress after tightening the connections.

To deepen your knowledge regarding the diagnostics and operation of the fuel system, it is worth using the guide material regarding the operation of injectors, pumps, and the fuel tank – it is discussed in detail in the article Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration, where you will find practical tips on selecting parts by OEM numbers and regeneration principles.

Characteristics of the used component

The offered Mercedes C218 Injection Pressure Line Tube Hose Pipe Set comes from disassembly and is a used item, which is a beneficial solution for users looking for an economical alternative to new components. Choosing an original, used component allows you to maintain the factory geometry of the lines and proper operating parameters in the high-pressure system, while simultaneously reducing the costs of repairing or upgrading the fuel system.

Expanding Mercedes fuel system service

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 pumps, supply lines, or pressure control elements, check the available parts in the Mercedes High-pressure fuel pumps category.