When your 2022 Mercedes-Benz GLC displays the P0304 code, the powertrain control module has detected recurring misfires in cylinder 4. Understanding the X253 generation's engine options enables targeted diagnosis for this popular luxury SUV.
Understanding P0304 in the 2022 GLC (X253)
The 2022 GLC X253 offers the M264 2.0L turbo four-cylinder (GLC 300) and M256 inline-six in AMG variants. For the four-cylinder, cylinder 4 is the rearmost position. Both engines use Mercedes' sophisticated direct injection and turbocharging technology.
Turbo Engine Considerations
Turbocharged engines operate under elevated pressures requiring robust ignition systems. Spark plugs must reliably fire under boost. Direct injection allows carbon accumulation on intake valves—a characteristic requiring periodic attention. Quality components ensure proper operation.
Diagnostic Process
Identify your engine configuration. Use Mercedes-compatible diagnostics for comprehensive data. Locate cylinder 4 based on your engine type. Test ignition coil output and spark plug condition. Consider carbon buildup for vehicles with higher mileage.
Repair Implementation
Install Mercedes-approved spark plugs for your engine. Replace ignition coils showing degraded output. Address carbon accumulation through professional cleaning if indicated. Quality repairs maintain Mercedes character.