Is your model fitted with Rain Sensors ?? ie , when you look at the top of the screen ( from the outside ) where the rear view mirror is located is there a kind of box fitted ??

If so then " 1 click up " on the stalk will be the " auto " setting and will only wipe the screen when the sensor is sufficiently covered in water .

All Mk5 Golf fitted with rain senitive wipers will stop wiping the screen constantly when you are stopped and switch to Auto and then resume a normal wipe when you set off again if I remember correctly .