The P0302 diagnostic code on your 2024 Mercedes-Benz GLC indicates cylinder 2 is experiencing misfires detected by the engine control module. The X254 GLC features the M254 2.0L turbocharged four-cylinder with 48-volt mild hybrid technology in GLC300 models. This advanced powertrain has specific characteristics for misfire diagnosis.
M254 Engine in GLC
The M254 produces 258 horsepower with integrated starter-generator providing mild hybrid assistance. Cylinder 2 is positioned second from the timing end of this inline-4. Direct injection operates at extremely high pressures for efficient combustion. The mild hybrid system adds electrical complexity but doesn't cause engine misfires.
Potential Misfire Causes
As a newer model, component defects are more likely than wear-related issues. Manufacturing variations in ignition coils, spark plugs, or fuel injectors can cause misfires. Software calibration issues occasionally affect specific cylinders. High-pressure fuel system irregularities can also cause misfires.
Symptom Recognition
The compact SUV displays rough idle, vibration, and hesitation with misfires. Four-cylinder engines show pronounced symptoms when one cylinder misfires. The refined driving experience suffers. Check engine light accompanies the condition.
Warranty Coverage
Your 2024 GLC is fully covered under Mercedes-Benz's warranty. Document symptoms and have dealer diagnosis for proper coverage.