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故障现象一辆2012年出厂的奔驰R300车,在山路行驶时仪表盘上的ESP灯报警,发动机转速表指针瞬间下降且无挡位显示,并出现转向沉重的故障现象。故障诊断接车后首先验证故障现象,经反复试车发现,仪表盘上的ABS、ESP及发动机故障灯间歇性报警,并伴有发动机转速表指针瞬间下降的现象;仪表盘中央多功能显示器间歇性显示“请不要换挡,立即到就近的授权经销商”的中文报警信息。使用星诊断检测,发现所有的CAN-C上的控制单元都
Symptom A 2012 Mercedes-Benz R300 car was shipped from the factory. The ESP lamp on the dashboard when the vehicle was running on a mountain track was decelerated and the tachometer pointer momentarily dropped and no gear was displayed. A serious turnaround occurred. Fault diagnosis After the first car to verify the phenomenon of failure, after repeated testing found that the dashboard ABS, ESP and engine fault light intermittent alarm, accompanied by the engine tachometer pointer instantaneous drop phenomenon; instrument panel central multi-function display intermittent Show “Please do not shift, immediately to the nearest authorized dealer ” Chinese warning message. Using Star Diagnostics tests found all control units on the CAN-C