The Mercedes W169 M266 fuel rail is an original component of the gasoline fuel system, designed for M266 engines in W169 A-Class models. It ensures stable gasoline supply to the injectors, which translates to smooth engine operation and the correct fuel dosage across the entire load range.
Specifications and technical data
- SKU: A2660700995
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A2660700995
- Substitutable numbers: A2660700995, A 266 070 09 95, A2660700695, A 266 070 06 95, A0000788849, A 000 078 88 49
- Fuel type: Petrol
- Category: Fuel Injectors
Purpose and Function of the Fuel Rail
The Mercedes W169 M266 fuel rail operates within the gasoline engine's fuel system, distributing fuel to individual injectors. It is responsible for:
- maintaining stable gasoline pressure within the rail, essential for proper fuel atomization,
- uniform supply to all cylinders, reducing the risk of misfires and uneven engine running,
- cooperating with the engine control system, which determines injector opening times based on sensor signals.
A functional fuel rail is crucial for maintaining the correct fuel-air mixture, impacting engine smoothness, performance, and fuel consumption.
Compatibility and Technical Specifications
The presented fuel rail belongs to the injector nozzle category and is specifically designed for gasoline systems in M266 engines used in the Mercedes A-Class W169 generation. Using an original component from the same family of parts allows for maintaining:
- factory fitment to the engine head and ancillaries,
- correct routing of fuel lines and connectors,
- compatibility with factory engine control unit maps, without the need for software modifications.
The rail is designed for systems powered by gasoline, which is important when selecting cooperating components such as injectors or fuel lines.
Characteristics of a Used Part
The offered fuel rail is a used part, sourced from disassembly. This type of component is a sensible choice in situations where:
- the original fuel rail has suffered mechanical damage (e.g., crack, leak),
- a quick and economical repair of the fuel system is necessary,
- you wish to maintain the original factory specification without resorting to aftermarket alternatives with uncertain parameters.
Choosing a used OEM component allows for maintaining the integrity of the fuel system while offering a favorable cost-to-functionality ratio.
Fuel Injection System Diagnostics and Technical Knowledge
Problems with the fuel rail or injectors can manifest as, among other things, uneven engine operation, power loss, or increased fuel consumption. Although the presented component relates to a gasoline system, the operating principle and typical symptoms of injector malfunctions are similar to those in diesel systems. If you want to better understand failure symptoms and the diagnostic process, it is worth familiarizing yourself with the material describing diesel injector faults – symptoms, consequences, and diagnostic methods, which clarifies many issues related to the operation of injection systems.
Related Mercedes Injector Nozzles
If you are also looking for other components in the Mercedes injector nozzle category for your car, check out the Mercedes injector nozzles available in our store to select a complete fuel system solution.
