Mercedes-Benz ML550 check engine light indicating misfire after battery replacement, dealer suggests replacing RH head on Mercedes-Benz ML550

Some Mercedes-Benz ML550 owners report experiencing check engine light indications of misfires following a battery replacement. These misfires can stem from various issues, including old spark plugs, failed ignition coils, or faulty spark plug wires. Owners have noted that engine misfires occur when the air-fuel mixture in the cylinders fails to ignite properly, potentially due to worn components or fuel delivery problems. It is crucial for owners to diagnose the specific cylinder where the misfire is happening to accurately identify the underlying cause. Additionally, some owners have found that misfires may be linked to transmission issues, such as slipping gears or fluid leaks, which can also trigger the check engine light. Before proceeding with costly repairs, such as replacing the RH head, it is advisable for owners to conduct a thorough diagnostic process to ensure the root cause of the misfire is accurately identified.