Where is the gearbox filler plug citroen relay?

The gearbox filler plug on a Citroën Relay is typically located on the side of the gearbox casing. It's usually a hexagonal or square-shaped plug that can be accessed from underneath the vehicle. To find it, you may need to raise the vehicle safely on jack stands for better visibility and access. Always refer to the vehicle's service manual for specific details related to your model year.