故障现象一辆2007款奔驰SLK350车,累计行驶里程约为5.4万km,出现接通驾驶人侧座椅加热开关后,座椅没有加热功能的现象。故障诊断根据故障现象,首先检查了驾驶人侧座椅加热开关的功能,发现该开关各挡位的功能显示正常,而且乘员侧座椅加热正常。使用DAS检测仪进行故障扫描,无任何故障记录,按压座椅加热开关时查看实际值,能正确反映开关的状态,初步判定开关及 Symptoms A 2007 Mercedes Benz SLK350 car, with a total mileage of about 54,000 km, appears connected to the driver side seat heating switch, the seat has no heating function phenomenon. Fault diagnosis According to the fault phenomenon, first check the driver side seat heating switch function and found that the function of each switch gear display is normal, and the passenger side seat heating is normal. Use DAS detector for fault scanning, without any fault record, press the seat heating switch to see the actual value, can correctly reflect the status of the switch, the initial judge switch and