A P0302 code on your 2022 Mercedes-Benz GLE indicates the engine control module has detected misfires in cylinder 2. The W167 GLE offers the M256 3.0L turbo inline-6 or M176 4.0L twin-turbo V8 depending on model. Each engine has specific diagnostic considerations for misfire resolution.
W167 Engine Options
The GLE450 features the M256 inline-6 with EQ Boost producing 362 horsepower. The GLE580 uses the M176 V8 producing 483 horsepower. Both engines use direct injection and turbocharging with associated maintenance considerations. Cylinder 2 location differs by engine type.
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. High-pressure fuel system issues can cause cylinder-specific misfires. Boost irregularities affect combustion consistency.
Symptom Recognition
The mid-size SUV displays rough idle, vibration, and hesitation with misfires. The inline-6's smooth character or V8's refinement becomes disrupted. Check engine light accompanies the condition.
Diagnostic and Repair Approach
Identify engine type. Use Mercedes-Benz compatible diagnostics. Inspect ignition components on cylinder 2. Test fuel system. Verify boost pressure. Given the newer model year, warranty coverage should apply to defect-related issues.