What to Do When a Mercedes-Benz Protection System Malfunction Prevents Starting?
2 Answers
Mercedes-Benz displays that the reasons for the protection system malfunction preventing the car from starting are: 1. Blown fuse; 2. Open circuit in the high-voltage coil or low-voltage circuit; 3. Damaged spark plug; 4. Fuel pump failure; 5. Blocked fuel line; 6. Cylinder leakage with no pressure; 7. Carburetor failure. More information about Mercedes-Benz is as follows: 1. Introduction: Mercedes-Benz is a German brand, and its models include: Mercedes-Benz E-Class, S-Class, G-Class, GLC, GLS, GLE, Maybach S-Class, etc. 2. Taking the Mercedes-Benz GLC as an example: its body dimensions are: length 4729mm, width 1890mm, height 1602mm, wheelbase 2873mm, fuel tank capacity 66L, and the body structure is a 5-door, 5-seat SUV.
I once had an issue with my Mercedes where the protection system malfunctioned and the car wouldn't start. It was really frustrating at the time. Mercedes' protection system mainly includes anti-theft and start-up safety controls, with common faults including key signal loss, module false alarms, or battery problems. First, don't panic—try starting the car with the spare key, as the original key might be out of battery. If that doesn't work, check if there are any warning lights flashing or alarm sounds inside the car. For regular maintenance, it's recommended to replace the key battery periodically to avoid voltage drops from prolonged parking and to clean the key contacts to prevent dust buildup. If the car still won't start, disconnect the negative terminal of the battery for five minutes and then reconnect it—this can force a system reboot. Safety first—don't force-start the engine to avoid damage, and call a tow truck to take the car to a 4S shop for diagnosis as soon as possible. The protection system involves the anti-theft module and ECU, and professional technicians will use diagnostic tools to read fault codes and make repairs.
