The Mercedes W211 M112 fuel rail is an original fuel system component designed for M112 engines in Mercedes E-Class W211 models. It ensures stable fuel distribution to the injectors, which translates to smooth engine operation and predictable performance.
Specifications and technical data
- SKU: A1120700595-1
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A1120700595
- Substitutable numbers: A1120700595, A 112 070 05 95
- Fuel type: Petrol
- Category: Fuel Injectors
Purpose and Role in the Fuel System
The Mercedes W211 M112 fuel rail is a key component of the gasoline engine's fuel system. It is responsible for evenly supplying fuel to individual injectors, maintaining proper working pressure, and stabilizing flow throughout the system.
In M112 engines, a correctly selected fuel rail supports:
- precise fuel metering by the injectors,
- stable idle operation and under load,
- proper throttle response and repeatable combustion parameters.
Category: Injector Nozzles and Compatibility
The presented component belongs to the Injector Nozzles category, meaning it works directly with gasoline injectors in the fuel system. The rail's design is adapted to the architecture of the M112 engine in the Mercedes W211, ensuring factory fuel line routing and correct injector positioning relative to the intake manifold.
Choosing an original fuel rail from this category helps maintain:
- compliance with the factory system geometry,
- correct injector positioning relative to the intake ports,
- consistency with factory engine control without the need for modifications.
Technical Characteristics and Fuel
The rail is designed to work with the gasoline fuel system. The material and construction are adapted to the operating parameters of gasoline fuel, including working pressures and thermal conditions within the engine bay.
In practice, this means:
- resistance to typical working pressures in gasoline systems,
- stable fuel delivery without uncontrolled pressure drops,
- proper compatibility with factory injectors used in the M112 engine.
Component Condition and Service Application
The fuel rail is offered as a used part, which is a sensible choice for servicing older powertrains like the M112 in the Mercedes W211. A used original part often provides better fit and compliance with factory parameters than aftermarket replacements of uncertain origin.
This solution is particularly beneficial when:
- diagnosing fuel system issues and you want to eliminate rail leaks,
- restoring the engine's factory configuration after previous modifications,
- seeking an economical solution while maintaining original specifications.
Technical Support and Additional Materials
If you are interested in other Mercedes injector nozzles and related fuel system components, check out our dedicated category: Mercedes injector nozzles. You will find a wide selection of components tailored to various models of this brand.
Although the described component pertains to a gasoline engine, when diagnosing fuel injection system problems, it is useful to know the typical symptoms of malfunctions. An article discussing the symptoms and consequences of injector failures in diesel engines may be helpful: diesel injector failures – symptoms, consequences, and diagnostics. The knowledge from this material helps understand the importance of the efficiency of the entire injection system, regardless of fuel type.
