How do you check the gearbox oil level on a citroen xsara Picasso?

To check the gearbox oil level on a Citroën Xsara Picasso, first ensure the vehicle is on a level surface and the engine is off. Locate the gearbox filler plug, usually found on the side of the gearbox; remove it using the appropriate tool. With the plug removed, oil should be just below the hole; if it isn't, you may need to add the appropriate gearbox oil until it starts to seep out of the hole. Always replace the filler plug securely after checking.