I have a 1999 540iT with Steptronic Auto, and when I move the shift lever from normal over to Sport, the engine revs don't change up......there is no differance with the transmission. The box will still shift up and down from 1st to 5th and back, but no change from sport to normal.
The car only gets 22 mpg on the freeway, so I think it is always in sport mode.
Two things......can someone with a 540iT please tell me what road speed they are traveling at when the revs are 3000 in both sport and normal.........and also, can anyone suggest what may be wrong to cause the trans not to shift from Sport to normal and back