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.
2011 e92 335is DCT - Cobb, ETS IC, AFE DCI, BMW PS kit, M3 control arms, various cosmetic improvements
2006 e90 330i 132k miles SOLD!