your auto tranny is controlled by a computer as opposed to a manual which is just that, manual. The computer has to think for a second before putting in the gear you want, so you can't do anything about the delay. I have an autotragic 328is, and I prefer manual mode to S mode, much more control. Check Dinan out, they sell an auto tranny chip for the e36 M3, so they might sell one for your car as well. Look around, it might be out there. What it will do is reduce that delay, make the car more responsive, raise rev limiter, etc.