1. Raise the vehicle safely using ramps or a jack and axle stands.
2. Locate the oil filler plug. On the Berlingo, it is typically a 17mm hex bolt located on the side of the gearbox housing.
3. Remove the oil filler plug using the appropriate wrench.
4. Insert a funnel into the filler hole.
5. Add the correct amount of gearbox oil. This information can be found in your vehicle's owner's manual or a workshop manual. The Berlingo typically requires around 2 liters of 75W-80 GL-4 or GL-5 gearbox oil.
6. Once the oil has been added, replace the oil filler plug.
7. Lower the vehicle and clean up any spilled oil.