The P0303 code in your 2022 Mercedes-Benz E-Class indicates the engine control module has identified cylinder 3 as experiencing misfires beyond acceptable limits. The W213 generation offers the M264 2.0L turbo four-cylinder and M256 3.0L turbo inline-six. Understanding your engine configuration ensures accurate diagnosis.
Cylinder 3 Configuration by Engine
Both engines are inline configurations. The M264 four-cylinder positions cylinder 3 third from the front. The M256 inline-six also positions cylinder 3 third from the front. Both use mild-hybrid technology.
Engine Characteristics
The M264 powers E350 variants with efficient turbocharged performance. The M256 provides smooth inline-six power in E450 variants. Both feature 48-volt mild-hybrid systems.
Common P0303 Causes at Two to Three Years
At this relatively young age, most misfires stem from ignition component issues or fuel quality problems. Manufacturing variations cause early failure. Carbon buildup affects airflow over time.
Mercedes-Benz Quality
Mercedes-Benz engines are engineered for refined operation. Any misfire affects the smooth driving experience.