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奔驰牌４２０ 或５００ 系列轿车的发动机燃油供给系统为电控机械喷射系统， 其怠速由独立的怠速ＥＣＵ 控制。本文介绍了怠速不良时， 通过检查或调整节气门开关、空气流量计及点火系统高压线电阻值等排除故障的方法
Mercedes-Benz 420 or 500 series car engine fuel supply system for the electronic mechanical injection system, the idle speed by an independent idle ECU control. This article describes the idling speed, by checking or adjusting the throttle switch, air flow meter and ignition system high voltage line resistance and other troubleshooting methods