I tried to keep the post as brief as possible.
To elaborate on what Elliott said, the car has an eight speed box, it would be near impossible to drive the car to its maximum potential with a manual box because of the clutch and gearchange work required. It is just about possible using the paddle shift though.
You ended up driving it in full auto mode because there were too many gears ( at some speeds you had a choice of 4 gears )