To find it, you should:
1. Consult your Berlingo's owner's manual: This is the most reliable source. The manual will have diagrams and instructions specific to your vehicle's model and year.
2. Look underneath the vehicle: The filler plug is usually located on the gearbox itself, which is towards the bottom of the engine bay and under the vehicle. It's often a small, circular plug with a different shape than other plugs, possibly with a slightly larger head.
3. Check online forums and resources: Search online for your specific Berlingo model year ("Citroën Berlingo [Year] gearbox oil fill location") to see if other owners have posted pictures or descriptions.
Important Notes:
* Do not attempt to add gearbox oil without consulting your owner's manual. Using the incorrect type of oil or overfilling can severely damage your gearbox.
* Be aware that the location of the drain plug is usually different than the filler plug. You'll need to locate both if you intend to perform a full gearbox oil change.
* If you're not comfortable working on your car yourself, take it to a qualified mechanic. Incorrect oil changes can cause substantial damage and expensive repairs.
Finding the correct location requires careful examination of your specific vehicle. Always prioritize your owner's manual as the primary source of information.