Mercedes W212 W218 Fuel Tank Pipe Hose Line Flow OM642 OM651 A2124701564

Mercedes W212 W218 Fuel Tank Pipe Hose Line Flow for Mercedes W212 and W218 models with OM642 and OM651 diesel engines is a fuel system component responsible for the stable flow of fuel between the tank and the rest of the installation. Thanks to a design tailored to the specific body platform and engine units, it ensures reliable routing of the working medium and reduces the risk of leaks in this critical area of the vehicle. The offered item comes from dismantling, which allows for an economical yet functional repair of the fuel system in Mercedes E-Class and CLS cars.

Specifications and technical data

• SKU: A2124701564
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2124701564
• Substitutable numbers: A2124701564, A 212 470 15 64
• Part type: Fuel Injector
• Category: Fuel Injectors

Application and compatibility with OM642 / OM651 engines

The discussed pipe is designed to work with OM642 and OM651 diesel units used in Mercedes W212 (E-Class) and W218 (CLS). Properly shaped geometry and factory connectors allow for the correct routing of the fuel line within the chassis and rear compartment, while maintaining original mounting points. As a result, installation is orderly, without the need for fuel system modifications or interference with the body structure.

Technical characteristics and role in the fuel system

The fuel tank pipe in a diesel system acts as a fuel flow channel with specific resistance to pressure, temperature, and diesel fuel. For OM642 and OM651 engines, maintaining proper tightness and flow is particularly important, as any leaks can lead to starting problems, power drops, or air entering the system. Using an original element from the Injector Nozzles group and related fuel system components helps maintain engine performance parameters at a stable level. Replacing the pipe is recommended when signs of corrosion appear on metal sections, micro-cracks on flexible sections, fuel leaks near the tank, or problems with maintaining system pressure occur. Using the correct pipe with factory specifications minimizes the risk of the fault returning after repair.

Benefits of using an original Mercedes fuel pipe

Choosing an original fuel pipe from dismantling for the Mercedes W212 / W218 offers several practical benefits:

• preservation of the factory fuel line routing and mounting points,
• compatibility with standard connectors used in OM642 and OM651 engines,
• reduced risk of leaks compared to universal replacements,
• possibility of economical repair while maintaining the original system design. Thanks to this solution, it is possible to restore the efficiency of the fuel system in an orderly manner, which translates into stable injector operation, correct starting, and predictable engine behavior across the full load range.

Condition, origin, and use in service practice

The item comes from a dismantled Mercedes vehicle, making it an attractive alternative to new components, especially for older W212 and W218 models. This type of part is often chosen by workshops specializing in diesel service, where both compliance with factory specifications and reasonable repair costs are important. Replacing the fuel pipe is a typical step during major work on the fuel system, such as injector regeneration or diagnostics of fuel pressure problems. To better understand the connection between the tank pipe and injector operation, it is worth reading the guide material describing the symptoms and consequences of diesel injector faults – they are discussed in detail in the article Diesel injector faults – how to recognize them and the risks of neglecting them. This allows for a more accurate assessment of when replacing the pipe alone is sufficient and when broader diagnostics are necessary.

Support with selection and other Mercedes fuel system elements

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 supply lines, return lines, or additional fuel line sections, check the available parts in the Mercedes Injector Nozzles category. For older models, where the availability of new components at authorized service centers is sometimes limited, solutions based on parts from dismantling can be particularly useful. This is described in more detail in the guide No parts at the dealership? How to handle repairs of older models using parts from dismantling, which shows how to consciously and safely use used components while maintaining the appropriate repair standard.