honestly, in an AWD car theres really no reason to turn it off.... in general you'ld turn off the trac control if you wanted to spin your tires ... tough in a quattro. in my allroad (and old A6 2.7t). the esp becomes much more useful in the 6speed cars when you can turn it off and get a bit of chirp outta the tires. i'd also turn the esp off at the track. ^_^