When your 2022 Mercedes-Benz C-Class displays the P0304 code, the engine control module has detected recurring misfires in cylinder 4. As the first year of the W206 generation, understanding the redesigned platform helps target diagnosis for this luxury sedan.
Understanding P0304 in the 2022 C-Class (W206)
The 2022 C-Class W206 introduced the M254 2.0L turbocharged four-cylinder with 48V mild hybrid technology replacing the previous M264. This inline-four positions cylinder 4 at the rear. The new platform brings advanced powertrain technology with specific diagnostic considerations.
First-Year W206 Considerations
As first-year production for the W206, monitor for technical service bulletins addressing platform-specific concerns. The M254 engine incorporates sophisticated technology including integrated starter-generator. Standard ignition and fuel causes remain primary P0304 sources.
Diagnostic Process
Use Mercedes-compatible diagnostics supporting W206 systems. Retrieve all codes including mild hybrid faults. Locate cylinder 4 at the rear of the engine. Test ignition coil output and spark plug condition. Verify fuel injector operation.
Repair Implementation
Install Mercedes-specified spark plugs for the M254 engine. Replace degraded ignition coils. Address fuel system concerns. Warranty coverage should apply to first-year manufacturing issues.