I have a 59 plate A5 Convertible with the 3.0 TDi and Quattro drive train and a 7 speed gearbox. I'm trying to find out when I need a gearbox service but I don't know which box I have. The Audi website says I have a S-tronic but it does not behave like a DSG and drives much more like an torque converter auto.

Could some one please let me know which box is fitted?