Mercedes-Benz S420 won't start, showing warning light and issues with trunk locking on Mercedes-Benz S420

Some Mercedes-Benz S420 owners report experiencing starting issues, often accompanied by warning lights on the dashboard and problems with trunk locking. These issues can stem from a dead battery, which is a common culprit, or a faulty alternator that fails to charge the battery while the vehicle is running. Additionally, some owners face challenges with a failed starter motor that prevents the engine from cranking. Warning lights, such as the battery or check engine light, may indicate serious underlying problems that require immediate attention. Furthermore, issues with trunk locking could be linked to electrical faults or a malfunctioning lock mechanism, necessitating a check of the trunk fuse and lock components. Sensor or switch failures, including those affecting the crankshaft position sensor or ignition coils, can also contribute to these starting difficulties. It is advisable for owners to conduct thorough diagnostics, paying close attention to warning signals and addressing trunk locking issues promptly to effectively resolve these concerns.