It may be caused by low battery voltage, control module failure, line failure, etc. And you need to go to the local 4s shop for repair. There are many reasons for engine start-stop system failure, such as starting system and wiring problems, engine electronic regulation system failure, or anti-theft system failure. It is recommended to contact 4s shop immediately for inspection and maintenance.

The function of the start-stop system: the automatic start-stop of the engine is to stop temporarily during the running of the vehicle. When the vehicle needs to start moving forward, the idling start-stop motor system will quickly respond to the driver's starting instruction, quickly start the engine and instantly switch on, so that fuel consumption and exhaust emissions will be greatly reduced.

The working principle of the start-stop system is that when the vehicle stops because of traffic jam or intersection, the driver steps on the brake pedal and stops to shift gears. At this time, the start/stop system automatically detects that the engine is idling and there is no gear; The wheel speed sensor of anti-lock braking system shows zero; The electronic battery sensor shows that there is enough energy for the next startup.

(Photo/Text/Photo: Car Selector) Mercedes-Benz S-Class Interface Li Yi Buick GL8 P5 Xpeng Motors P7 @ 20 19