The Mercedes W203 W211 OM646 Fuel Injector is an original injector nozzle designed for Mercedes diesel engines from the OM646 family, used in models such as the C-Class W203 and E-Class W211. This component ensures precise diesel fuel metering, which translates to stable engine operation and proper functioning of the injection system.
Specifications and technical data
- SKU: A6460700287
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6460700287
- Substitutable numbers: A6460700287, A 646 070 02 87, BG
- Fuel type: Diesel
- Category: Fuel Injectors
Purpose and Role in the Injection System
The presented injector belongs to the category of injector nozzles and is dedicated to diesel engines in Mercedes vehicles. Its function is to accurately atomize fuel in the combustion chamber, maintaining the correct pressure and injection timing, which is crucial for performance, fuel consumption, and emissions.
A properly selected injector nozzle for a specific OM646 engine allows for:
- stable idle speed without jerking or misfires,
- proper acceleration dynamics across the entire RPM range,
- controlled smoke levels and reduced pollutant emissions.
Application in OM646 Diesel Engines
OM646 engines are popular Mercedes diesel units used in many body configurations. The application of the correct injector nozzle is important for both standard operation and after engine control unit software modifications. The diesel-compatible injector ensures:
- precise fuel metering across the entire load range,
- correct injection spray pattern tailored to the OM646 combustion chamber,
- seamless integration with the factory engine control unit and injection maps.
Product Characteristics and Condition
The offered item is an original Mercedes part from the injector nozzle group, sourced from a dismantled vehicle. This type of component is a good choice for servicing the injection system when aiming to maintain factory engine operating parameters and compatibility with other components.
As a used part, the injector may show signs of wear, but its construction is prepared for further operation after correct installation and potential ECU adaptation. In many cases, this allows for an economical restoration of the injection system's functionality without the need to invest in a new set.
Benefits of Using an Original Injector Nozzle
Choosing an original injector for an OM646 engine in a Mercedes W203 or W211 primarily offers:
- maintenance of factory operating parameters – injection quantities, timings, and pressures consistent with manufacturer specifications,
- better integration with engine electronics compared to low-quality aftermarket alternatives,
- reduced risk of starting problems, idle fluctuations, or excessive smoking.
When replacing a single injector, it is advisable to ensure proper diagnostics of other fuel system components and correct coding/adaptation if required by the specific control unit.
Injection System Diagnostics and Prevention
If your Mercedes exhibits symptoms such as uneven cold running, power loss, increased fuel consumption, or characteristic knocking sounds near the cylinder head, it is worth checking the condition of the injectors. A detailed discussion of typical symptoms and potential consequences of neglect can be found in the article: Diesel Injector Failures – How to Recognize Them and What Neglecting Them Entails.
Other Mercedes Injector Nozzles
If you are also looking for other Mercedes injector nozzles for different cylinders or other models of this brand, please check our dedicated category: Mercedes Injector Nozzles. This will help you easily select a set of injectors tailored to your specific engine version and vehicle year.
