Fuel Line Mercedes W205 Diesel OM651 Injection Rail Feed Return A6510701235

Mercedes W205 Diesel OM651 Fuel Lines for Injector Rail are an original fuel system component designed for OM651 diesel engines in the C-Class W205 model. Precisely manufactured lines ensure stable diesel fuel delivery to the injector rail, which translates to smooth engine operation and correct injection characteristics. This is a solution for users who expect factory fitment and preservation of common rail system operating parameters.

Specifications and technical data

• SKU: A6510701235
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6510701235
• Substitutable numbers: A6510701235, A 651 070 12 35
• Fuel type: Diesel
• Category: Other Air & Fuel Delivery

Intended Use and Function in the Fuel System

The fuel lines for the injector rail in the Diesel OM651 engine are responsible for transporting high-pressure fuel between the high-pressure pump, the injector rail, and the injectors. A correctly selected component helps maintain:

• stable pressure in the common rail,
• appropriate fuel doses for each cylinder,
• repeatability of injection parameters across the full load range.

This ensures the engine maintains proper running smoothness, and the engine control unit can precisely implement injection strategies, which are crucial for both performance and exhaust emissions.

Benefits of Using Original Lines

Using fuel lines dedicated to a specific engine and W205 body provides a range of practical installation and operational benefits:

• precise routing of lines in the engine bay, consistent with factory brackets and covers,
• appropriately selected stiffness and flexibility, reducing vibrations and stresses at connections,
• compatibility with original connectors and sealing elements of the injection system.

Such a fit minimizes the risk of leaks, pressure drops, or undesirable resonances in the fuel system, which is particularly important in modern diesel engines.

Characteristics of a Used Part

The offered set of lines is a used part, removed from a vehicle, and intended for reinstallation. A used part allows for an economical repair of the fuel system while maintaining the original fuel line geometry. This solution is particularly useful in situations where the lines have suffered mechanical damage, the engine bay has been tampered with, or it's necessary to restore the factory configuration after previous modifications.

Selection and Compatibility with Mercedes W205

The fuel lines for the injector rail are structurally linked to a specific engine generation and the W205 body configuration. When selecting parts, it is crucial to pay attention to:

• compatibility with the OM651 engine unit,
• the routing of lines in the engine bay,
• the type of injection system used in the specific vehicle version.

A correctly selected set of lines facilitates installation, reduces service time, and avoids modifications to the fuel system.

Support for System Expansion and Additional Materials

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as lines, mounts, or small fuel system components, check the available parts in the Other Mercedes category.

To compare solutions used in different brands and engine versions, including sports variants, the material discussing the differences in engine construction, accessories, and chassis may be helpful – you can find it in the article Audi RS vs. Other Models – What's Under the Hood and Chassis?, which shows how manufacturers design key systems in cars with varied performance.