Diagnostic trouble code P0306 on your 2022 Mercedes-Benz C-Class indicates a cylinder 6 misfire detection, which creates an immediate diagnostic contradiction. The 2022 model year introduced the new W206 C-Class with four-cylinder engines exclusively, meaning there is no sixth cylinder to experience a misfire.
2022 C-Class Powertrain Change
The 2022 model year marked a significant powertrain transition for the C-Class. The new W206 generation replaced all previous six and eight-cylinder options with four-cylinder engines. The C300 uses a 2.0-liter turbocharged four-cylinder, and the C43 AMG uses a 2.0-liter turbo-four with mild hybrid assist.
P0306 on Four-Cylinder Engine
P0306 specifically identifies cylinder 6 as the misfire source, but your 2022 C-Class only has cylinders 1-4. This code cannot represent a legitimate engine condition and instead indicates diagnostic system malfunction from scanner errors, ECM issues, or aftermarket device interference.
Diagnostic Approach
Verify the code with Mercedes STAR diagnostics. Remove aftermarket devices. Check for legitimate P0301-P0304 codes if actual misfire symptoms exist. The real problem, if any, exists within the four actual cylinders.