How do you change gearbox oil on 2006 citroen dispatch?

To change the gearbox oil on a 2006 Citroën Dispatch, start by ensuring the vehicle is securely raised and level. Remove the drain plug from the gearbox and let the old oil drain completely. Once drained, replace the drain plug, then locate the fill plug, and use a funnel to pour in the new gearbox oil until it reaches the correct level. Finally, replace the fill plug and check for any leaks before lowering the vehicle.