Where is the gearbox filler plug citroen relay?

The gearbox filler plug on a Citroen Relay is located on the side of the gearbox, usually towards the front. It is typically a 17mm bolt or plug, and may be covered by a plastic cap. It may be easier to remove the bottom engine tray to look for the filler plug. The transmission drain plug is located on the bottom of the gearbox, usually towards the rear.