Hi, I'm keen to hear from any s4 owners who have an auto 6-speed tiptronic box. I collected mt new S4 cabriolet 10 days ago and experienced problems with the auto box. At constant low speed throttle the revs would fluctuate - not wildly but enough to know that something was wrong. The dealer has been told by Audi to fit a new box and one is on back-order. Reading other posts there seems to have been a lot of owners with problems with manual boxes but I wanted to get feedback from tiptronic owners. The dealer says my problem appears related to water contamination of the gearbox fluid but they have no idea how it might have happened. I'm very worried now, should I get ready to reject the car or wait and see what the outcome of the repair is? <font color="blue"> </font>