I don't think you are creating instances of these classes correctly. Instead of:
CDSensors* LSensors = &CDSensors (0);
CDSerialPrint* LSerialPrint = &CDSerialPrint (0);
MPU9250_DMP Limu = MPU9250_DMP ();
How about:
CDSensors LSensors (0);
CDSerialPrint LSerialPrint (0);
MPU9250_DMP Limu;
I can't get your code to compile, but what I suggest looks a lot simpler.