车型:奔驰SL300,配备272发动机、722.9变速器。行驶里程:29628km.故障现象:行驶在烂路时仪表发动机故障灯突然点亮,ESP报警,发动机前部噪声大。故障诊断:接车后确认故障现象,果不其然如客户所述,启动发动机,电子风扇狂转,仪表显示发动机故障灯点亮,ESP报警,如图1所示。并且在没有启动时,打开门时仪 Model: Mercedes SL300, equipped with 272 engines, 722.9 transmission. Mileage: 29628km. Symptom: When driving in the bad road instrument engine fault light suddenly lit, ESP alarm, the front of the engine noise. Troubleshooting: After confirmation of the car to confirm the fault phenomenon, as a matter of course, as the customer said, start the engine, electronic fan crazy, the instrument shows the engine fault light is lit, ESP alarm, as shown in Figure 1. And when not activated, open the door meter