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故障现象一辆2012款奔驰E300轿车。搭载M272发动机,累计行驶里程约为8.5万km。据驾驶人反映,该车在行驶中发动机突然熄火,且无法重新起动着机。同时仪表盘上有很多故障灯点亮。故障诊断接车后试车发现发动机确实无法起动着机,仪表盘上除了有很多故障灯点亮以外,还有一些文字性的故障提示(图1),另外还发现电动座椅无法调节,车窗玻璃无法升降,音响和空调无法工作。进一步与驾驶人沟通得知,该车最近在行驶中仪表盘上的很多故障灯偶尔会点亮。但瞬间就会熄灭,且发动机不会熄火。由此推断该车当前故
Symptom A 2012 Mercedes-Benz E300 sedan. Equipped with M272 engine, the cumulative mileage of about 85,000 km. According to the driver reflected that the car suddenly turn off the engine while driving, and can not restart the machine. At the same time there are many fault lights on the dashboard light. Fault diagnosis After the test car and found the engine really can not start the machine, the dashboard in addition to a lot of fault lights lit, there are some textual fault tips (Figure 1), also found that the electric seat can not be adjusted, the window Glass can not lift, audio and air conditioning can not work. Further communication with the driver revealed that many of the trouble lights on the dashboard of the car were traveling occasionally occasionally. But the moment will go out, and the engine will not stall. It is inferred that the current car