A P0303 code in your 2024 Mercedes-Benz E-Class indicates the engine control module has detected persistent misfires at cylinder 3. The all-new W214 generation E-Class uses the M254 2.0L turbocharged four-cylinder with mild-hybrid technology in most variants. Understanding this powertrain ensures accurate diagnosis of this executive sedan.
Cylinder 3 in the M254 Engine
The M254 is an inline four-cylinder engine with cylinder 3 positioned third from the front. This sophisticated engine includes integrated starter-generator technology for mild-hybrid functionality.
New Generation Platform
The 2024 E-Class represents a complete redesign with updated powertrains and extensive technology. As a new generation, some refinements may be addressed through software updates.
New Vehicle Misfire Scenarios
Even brand-new Mercedes-Benz vehicles experience P0303 codes from manufacturing defects, fuel quality issues, or software calibration sensitivity.
Executive Sedan Standards
The E-Class defines executive luxury. Any misfire affects the refined driving experience expected from this flagship sedan.