What are the causes of Mercedes-Benz protection system failure?
2 Answers
Possible causes of Mercedes-Benz protection system failure: 1. Damaged airbag. 2. Faulty seat belt sensor. 3. Defective airbag sensor. 4. Anti-towing system issue. Failure to start may be due to battery depletion, poor contact at terminal connections, or battery management system problems. Extended information: Other possible reasons for a car not starting include: 1. Electrical or electronic faults: These often occur suddenly without warning. Electrical faults may include: blown fuses, open circuit in high-voltage coil, open circuit in low-voltage wiring, detached central ignition wire, leaking distributor rotor, or damaged spark plugs. Electronic faults mainly refer to malfunction of the central computer control module. 2. Fuel system faults: Stalling caused by fuel system issues often exhibits symptoms like weak engine power or a spongy accelerator pedal. Potential fuel system fault locations include: fuel pump failure, blocked fuel lines, clogged fuel filter, carburetor malfunction, or injector damage. 3. Mechanical faults: Common mechanical failures include: timing belt (chain) breakage, cylinder leakage with no compression.
I just had this issue last week with my Mercedes-Benz E-Class suddenly showing a protection system fault light. At the dealership, they found out the millimeter-wave radar was covered in bird droppings, and the sensor couldn't read any data at all. The technician said about 80% of such faults are sensor-related, like cameras blocked by mud, radar probes loose or misaligned, or detectors in the front grille getting nests built by insects. If the sensors are fine, it's likely a control module issue, like the car's computer being overwhelmed by too much safety data. Another time, my friend's car had a fault because the wiring was disturbed during a stereo upgrade, causing oxidation at the data cable connector, which blocked the signal and triggered the fault. The most troublesome is when the software system is too outdated and incompatible with the latest navigation maps. It's best not to tinker blindly—reading the fault codes as soon as possible is the most reliable approach.
