When your 2022 Mercedes-Benz E-Class displays the P0304 code, the powertrain control module has detected recurring misfires in cylinder 4. Understanding the W213 generation's engine options enables targeted diagnosis for restoring this executive sedan's refined performance.
Understanding P0304 in the 2022 E-Class (W213)
The 2022 E-Class W213 offers the M254 2.0L turbo four-cylinder (E300) and M256 3.0L turbo inline-six (E450) with EQ Boost mild hybrid technology. Cylinder 4 location varies by engine. Both use Mercedes' sophisticated direct injection and turbocharging.
Executive Sedan Considerations
The E-Class demands smooth, refined operation befitting its executive status. Turbocharged engines face elevated ignition demands. Direct injection contributes to carbon accumulation requiring periodic attention. Quality components ensure the driving experience expected from this premium vehicle.
Diagnostic Process
Identify your engine—M254 I4 or M256 I6. Use Mercedes-compatible diagnostics for full code and freeze frame data. Locate cylinder 4 based on your configuration. Test ignition coil output and spark plug condition. Consider carbon buildup for higher-mileage vehicles.
Repair Implementation
Install Mercedes-approved spark plugs for your engine type. Replace ignition coils showing degraded output. Address carbon accumulation through professional cleaning if indicated. The E-Class executive character requires quality repairs.