The P0302 trouble code on your 2020 Mercedes-Benz GLE indicates that cylinder 2 is experiencing misfires detected by the engine control module. The W167 GLE uses the M256 3.0L turbo inline-6 or M176 4.0L twin-turbo V8. At typical 2020 mileage, age-related factors may contribute to misfire conditions.
2020 GLE Engine Options
The GLE450 uses the M256 inline-6 while the GLE580 features the M176 V8. Both engines have accumulated meaningful mileage. Direct injection may have developed carbon buildup. Ignition components may be approaching replacement intervals.
Common Misfire Causes
By 2020 mileage, carbon buildup on intake valves may be significant on direct-injection engines. Ignition coil degradation from heat and age affects spark delivery. Spark plug wear reduces ignition energy. Vacuum leaks from aged components can develop.
Age-Related Considerations
The 2020 model year is approaching higher mileage where maintenance becomes important. Carbon cleaning, ignition component replacement, and system inspection should be part of comprehensive diagnosis.
Symptom Recognition
The mid-size SUV displays rough idle, vibration, and hesitation with misfires. The refined Mercedes-Benz character suffers. Check engine light accompanies the condition.
Repair Solutions
Replace spark plugs with specified units. Replace ignition coils as needed. Clean intake valve carbon. Service fuel system components. Address any vacuum leaks discovered.