Mercedes-Benz ML350 check engine light issue recurring after EGR system replacement and wrong engine oil use on Mercedes-Benz ML350

Some Mercedes-Benz ML350 owners report experiencing recurring check engine light issues, particularly after replacing the EGR system or potentially using the wrong engine oil. These issues can be triggered by various factors, including problems in the emission, ignition, or engine timing systems. Some owners note that a blinking check engine light may indicate a severe engine misfire, which requires immediate attention due to the risk of unburned fuel entering the exhaust system. Proper diagnosis is crucial, especially if performance problems or unusual noises are present. Additionally, a loose or damaged fuel cap can also activate the check engine light by affecting fuel system pressure. Owners are advised to address the underlying problems to reset the light automatically, or they can use an OBD-II scanner to clear the diagnostics code. Understanding these triggers is essential for efficient resolution, as timely attention to common causes can prevent further complications.