故障现象一辆2012款奔驰R300车,搭载型号为M272的自然吸气V6发动机,行驶里程约为9万km。因发动机无法起动而拖车进厂检修。据客户反映,车辆在地库停放一晚后,就出现了无法起动的故障现象。故障诊断接车后,试车验证故障现象,接通点火开关尝试起动发动机,起动机运转有力,由此可以排除蓄电池电压低及车辆停放期间出现曲轴抱死的问题,查看燃油 Trouble phenomenon A 2012 Mercedes R300 car, equipped with a naturally aspirated V6 engine model M272, mileage of about 90,000 km. Due to the engine can not start trailer into the plant overhaul. According to the customer, the vehicle parked in the basement for one night, there was a failure to start the phenomenon. Fault diagnosis After the car, the test to verify the phenomenon of failure, turn on the ignition switch to try to start the engine, the starter operation is strong, which can be ruled out low battery voltage and locking of the crankshaft during parked car problems, check the fuel