if you are under the car on the front of the gearbox about half way up in the middle you will see a 10m allen key bolt remove that one to top it up if you want to change the whole gearbox oil at the bottom next to driveshaft on the right their is a 24m bolt undo that to drain it all out remember to put it back in before you fill it up and fill it up on the allen key bolt till it comes out of the hole then job done hope that helps mate!!!!! :Dit is manual isnt it other wise its a bit different for an auto!!!!!!!!!