Mercedes W206 W214 X254 Fuel Rail with Injectors M254 A2540702500 is a complete fuel rail with petrol injectors, designed for modern M254 series engines. This component comes from the Mercedes range and is suitable for petrol fuel systems, ensuring stable engine operation and correct fuel delivery.
Specifications and technical data
- SKU: A2540702500
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A2540702500
- Substitutable numbers: A2540702500, A 254 070 25 00, 0403281872, 0 403 281 872, 0261555240, 0 261 555 240, 0261500810, 0 261 500 810, A2540700700, A 254 070 07 00
- Fuel type: Petrol
- Part type: Fuel Injector
- Category: Fuel Injectors
Purpose and Function in the Fuel System
The fuel rail with injectors in a petrol engine plays a crucial role in the precise distribution of fuel to individual cylinders. The M254 units utilize an advanced injection system where the correct flow characteristics and injector sealing directly impact:
- stable idle operation and reduced engine vibrations,
- proper acceleration dynamics and flexibility across the entire RPM range,
- maintaining optimal mixture composition, which contributes to lower fuel consumption,
- reduction of exhaust emissions and improved engine running smoothness.
Selecting the correct fuel rail with injectors for a specific M254 engine variant is key to preserving factory performance parameters and reliability.
Benefits of Using an Original Mercedes Fuel Rail
Using a fuel rail from the Mercedes range helps maintain consistency with the original fuel system design. The appropriate geometry of the rail body, spray pattern characteristics, and injector operating parameters translate to:
- correct fuel pressure throughout the entire rail, without local drops or fluctuations,
- even fuel delivery to all cylinders, minimizing the risk of uneven engine operation,
- compatibility with the factory engine control unit and injection maps,
- preservation of cold and hot start characteristics as intended by the manufacturer.
For petrol engines like the M254, the quality of injection components is particularly important during operation under load and in eco and dynamic driving modes.
Component Condition and Installation Aspects
The offered fuel rail with injectors is in used condition, allowing for an economical repair of the fuel system while maintaining original manufacturer specifications. Before installation, a standard workshop procedure is recommended, including:
- verification of fuel system tightness after installation,
- checking injector operating parameters using an appropriate diagnostic tester,
- confirming the correct mounting of the rail and electrical connections of the injectors.
A correctly installed fuel rail with injectors restores proper engine operating parameters, reducing the risk of jerking, misfires, or excessive fuel consumption.
Mercedes Injector Nozzles – Selection and Further Knowledge
If you are looking for other components in the Mercedes injector nozzles category, you can visit our dedicated subpage, where you will find a wide selection of parts for various models of this brand: Mercedes injector nozzles.
Although the presented component is for a petrol engine, many principles of diagnostics and symptoms of wear in injection systems are similar to those in diesel engines. It is worth familiarizing yourself with material discussing the symptoms and consequences of neglecting the injection system to better understand the importance of functional injectors in modern engines: diesel injector faults – symptoms, consequences, and diagnostics.
Summary
Mercedes W206 W214 X254 Fuel Rail with Injectors M254 A2540702500 is a functional component of the fuel system in a petrol engine, designed for M254 series units. Using an original fuel rail with injectors helps maintain stable engine operation, correct fuel delivery, and compliance with factory control unit settings. This is a practical solution for owners and workshops looking to restore the functionality of the injection system while preserving manufacturer-intended parameters.
