On the 2.2 '06 on, you can fill the gearbox through the breather on top of the gearbox from inside the bonnet, pull of the plastic cover. You will need a small funnel to fit into the hole under the plastic cover. Use the 1 litre bottles with a tube. Fix another tube onto the bottle, 50cm should be enough, then just poor into the funnel. It take about 2.7 litres. Use 75w 80w Hope this helps.
john
June 2015