I have a 2020 Mercedes A220 that has a misfire in the #4 Cylinder. I replaced the spark plug and ignition coil. This lasted about 3 weeks, then the code reappeared. When the code showed back up I replaced the spark plug again and replaced all 4 along with all 4 ignition coils. The code will not go away and the engine will still idle rough and lose power while driving. Is there an issue that i am missing or a solution to fix this problem?