What Causes the 48-Volt On-Board Electrical System Failure in Mercedes-Benz?
2 Answers
Mercedes-Benz displaying a 48-volt motor fault may be due to damaged electrical equipment, faulty or poor contact in circuit control switches, damaged protection devices in the circuit, poor circuit grounding, or damaged wiring in the circuit. The specific issue and repair method need to be identified based on the specific symptoms. Alternatively, the vehicle can be handed over to professionals for inspection and repair. Taking the Mercedes-Benz C260L as an example, the following details are provided: 1. Suspension: The front suspension of the Mercedes-Benz C260L is a multi-link independent suspension, and the rear suspension is also a multi-link independent suspension; 2. Powertrain: The Mercedes-Benz C260L is equipped with a 1.5T turbocharged engine, delivering a maximum horsepower of 156 PS, a maximum torque of 250 Nm, and a maximum power of 115 kW, paired with a 9-speed automatic transmission.
I've been driving Mercedes for many years, and 48V system failures are quite common, mainly because the 48V battery is too fragile. After prolonged use, the battery ages and can't hold a charge, especially during frequent start-stop operations where it drains even faster. Secondly, the software often has bugs, and Mercedes is slow with updates—suddenly getting a warning while driving can be quite alarming. I've also encountered loose wiring connectors that corroded from rainwater, leading to poor contact. It's advisable to minimize high-load usage like air conditioning and keep the battery at least half full before parking. During Mercedes maintenance, it's especially important to remind them to check this system to avoid breakdowns on the road. Modern cars add this system for fuel efficiency, but its reliability really can't compare to the traditional 12V system, so extra caution is needed.
