Mercedes-Benz E550 car turns over but won't run, fuel pump replaced on Mercedes-Benz E550

Some Mercedes-Benz E550 owners report experiencing issues where the vehicle turns over but won't run, even after replacing the fuel pump. These problems may stem from a faulty starter that prevents proper engine operation, or issues within the fuel system, such as a clogged fuel filter or a malfunctioning fuel pump relay. Additionally, failures in sensors or switches, like the crankshaft position sensor or ignition coils, can lead to starting difficulties. Some owners also encounter problems due to a low-voltage battery, which may result from a faulty starter motor or starter relay. Malfunctions with the key fob or ignition switch can further hinder the car's ability to start, and a blown fuse can impact the starting process as well. It is advisable for owners experiencing these issues to seek a professional mechanic's assistance for accurate diagnosis and resolution.