When Audi talks of a driverless TTS, the words "unintended acceleration" aren't mentioned. But it turns out that Audi has big plans for its little coupe. Its American president, Johan de Nysschen, has declared: "Sometime soon, maybe even the fourth quarter of this year, an Audi TTS is going to make the climb up Pikes Peak in Colorado. There will be no one in the driver's seat."