Hi. Could somebody explain what RPM "KLW" mean, in an car, bus or truck vehicle? I know RPM mean rotations per minute of the engine, but RPM "KLW"? Would it be the number of rotation per minute of the alternator (battery charger) ? I am asking because last week I've used a Mercedes-Benz automotive scanner in a Mercedes bus, and the PC software of this scanner shows two kinds of RPM values in the screen: - RPM Instantaneous - RPM KLW In this Mercedes-Benz scanner, I noticed the "RPM KLW" and the "RPM Instantaneous" always have similar values.