Push back for snow mode {locks rear diff and give very little power to get grip and wont let you go over 40mph} thought i broke my car when i pushed it with out noticing centre postion normal mode {trys to be eco changes early and throttle responce slow and slow to change} POWER mode {throttle responce improves holds in in lower gears longer and changes down faster and revs out for longer and drives alot better} unless in triptronic as you change up gears or will just bounce off the limiter you also change down manualy but can be slow to change when you want it to but if you brake it will change down automaticly so you ready togo again