案例1奔驰GLS400车空气悬架故障故障现象一辆2016款奔驰GLS400车,底盘号为4JG166864,装配M276发动机,配置空气悬架,行驶里程约为1 000 km,因为仪表盘上提示“车身升降故障”而进店维修。故障诊断接车后试车验证故障,接通点火开关起动发动机,发动机顺利起动,随后仪表盘即出现“车身升降故障”的报警提示信息(图1),此外,仪表盘上其他显示信息均正常。观察车身高度,未见异常。经询问驾驶人得知,该车辆 Case 1 Mercedes-Benz GLS400 car air suspension failure Symptoms A 2016 Mercedes-Benz GLS400 car chassis number 4JG166864, equipped with M276 engine, air suspension configuration, mileage is about 1 000 km, because the dashboard prompts “body lift Fault ”into the store repair. Fault diagnosis After the test car to verify the fault, turn the ignition switch to start the engine, the engine started smoothly, then the instrument panel appears “body lift failure” alarm message (Figure 1), in addition, other information on the instrument panel normal. Observe the height of the body, no abnormalities. Upon inquiry, the driver learned that the vehicle