Why Can't the Mercedes-Benz Start Due to Protection System Failure?
2 Answers
Possible causes of Mercedes-Benz protection system failure: 1. Damaged airbag. 2. Faulty seat belt sensor. 3. Damaged airbag sensor. 4. Anti-towing issue. Reasons why the car won't start are as follows: 1. Electrical or electronic failure: blown fuse, open circuit in high-voltage coil, open circuit in low-voltage circuit, detached central ignition wire, leaking distributor rotor, damaged spark plug. Electronic failure mainly refers to the malfunction of the central computer control board. 2. Fuel system failure: Symptoms include weak engine power and the accelerator pedal feeling like stepping on cotton. Possible issues include fuel pump failure, blocked fuel line, clogged fuel filter, carburetor malfunction, or damaged injector. 3. Mechanical failure: Broken timing belt (chain), cylinder leakage with no pressure, etc.
I've been driving a Mercedes for several years and have encountered a few embarrassing situations where the protection system malfunctioned, preventing the engine from starting. Common causes include depleted key fob batteries or false triggers of the anti-theft system. Mercedes' anti-theft features are quite advanced—when the key fob battery dies, the system can't authenticate and locks the engine. First, try replacing the key fob battery; that’s likely the issue. If that doesn’t work, it could be a sensor or circuit failure, such as a faulty crankshaft position sensor putting the ECU into protection mode. I once tried fixing it myself without success and ended up having to visit the dealership to use an OBD scanner for decoding. Remember, don’t force repeated starts, as it might damage more components. For safety, calling a towing service is the most reliable option.
