A P0302 code on your 2022 Mercedes-Benz GLC indicates the engine control module has detected misfires in cylinder 2. The X253 GLC300 is powered by the M264 2.0L turbocharged four-cylinder producing 255 horsepower. This direct-injection turbo engine has specific diagnostic considerations for misfire resolution.
M264 Engine Overview
The M264 is a 2.0L inline-4 with turbocharging and direct fuel injection. Cylinder 2 is positioned second from the timing chain end. The engine provides a good balance of performance and efficiency for the compact SUV segment. Direct injection creates specific maintenance considerations.
Common Misfire Causes
Direct injection carbon buildup can develop on intake valves over time. Ignition coil degradation from turbo heat affects spark delivery. Spark plug wear reduces ignition energy under boost. High-pressure fuel system issues can cause cylinder-specific misfires. Boost leaks create lean conditions.
Symptom Recognition
The compact SUV displays rough idle, vibration, and hesitation with misfires. Four-cylinder engines show pronounced symptoms. The Mercedes-Benz driving experience suffers. Check engine light accompanies the condition.
Diagnostic and Repair Approach
Use Mercedes-Benz compatible diagnostics. Inspect ignition components on cylinder 2. Test fuel system operation. Verify boost pressure. Given the newer model year, warranty coverage should apply to defect-related issues.