......What's the difference between S and D .......
Rolfe.
S = Slow
D = Dull
Sorry, could not help this jibe! 
Hope your foot gets better. You should be more careful and stop stepping on ducks! 
S=Super
D=Deluxe

On a more serious note, when I drive mine, I am 99% on manual mode. I enjoy using the paddles to shift up and down, and if going round a corner, then I use forward and back on the gear-stick.
I really like my DSG.
