Put it in s6 and drive it at 60mph in 4 gear then nail it and chang up to 5 gear it should chang up with a bang and not sound like it is hesatating
The gear change remembers how you drive there is a part in the manuel
how to reset it
If i rember right drive at 50mph then pull the 2 flappy paddles back for a couple of seconds and thats it done i think
But look at the books that came with the car

that always helps