What a great thread! Having owned my IS a little over two months now, I am noticing that it is a lot happier in either full auto with sport on, or manual mode with or without sport mode. When you refer to dtc off and completely off, what do you mean? One press of a button it is off, I am not aware of any secondary deactivation.. I may be wrong.
2016 F80 M3 BSM with Black interior DCT/Driver Assistance/Executive/LEDs/Adaptive/Black Wheels
2014 F32 435i xDrive AW/CR
2014 F25 X3 M-Sport Carbon Black
2011 e92 335is 2007 X3 122k miles 2006 e90 330i 132k miles