Mercedes-Benz Diesel: How to Perform Fuel Injector Coding on the OM642 Engine

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Properly coding fuel injectors on a Mercedes-Benz OM642 3.0L V6 diesel engine is essential for optimal performance, fuel efficiency, and emissions control. Each injector has a unique calibration code that must be programmed into the engine control unit (ECU) after replacement to ensure precise fuel delivery. Using a diagnostic scanner, you can enter the injector codes, reset adaptations, and verify smooth engine operation. This process prevents rough idling, misfires, excessive smoke, and poor fuel economy.

Vehicles Using the OM642 Engine:
Mercedes-Benz: E-Class (W211, W212), S-Class (W221), ML-Class (W164, W166), GL-Class (X164, X166), R-Class (W251), Sprinter (W906, W907), G-Class (W463), CLS-Class (W219, W218)
Jeep: Grand Cherokee WK (2007–2008)
Dodge: Sprinter (2007–2009