- A suitable gearbox fluid, as recommended by the manufacturer
- A funnel
- A 24mm wrench or socket
- Safety goggles and gloves
Here's a general procedure to follow:
1. Ensure that the vehicle is parked on level ground and the engine is off and completely cooled down.
2. Locate the gearbox fluid filler plug. This is usually found on the top or side of the gearbox, and might be labeled with a symbol or the word "Oil" or "Fluid."
3. Clean the area around the filler plug to prevent any dirt or debris from entering the gearbox.
4. Place the funnel into the filler plug hole.
5. Slowly add the gearbox fluid into the funnel until it reaches the recommended level. The exact amount needed may vary depending on the specific model and type of gearbox, so refer to your vehicle's owner's manual or a reliable automotive resource for the correct quantity.
6. Allow the fluid to settle by waiting a few minutes, then check the fluid level again. If necessary, add a little more fluid to bring it to the correct level.
7. Once the correct fluid level is achieved, replace the filler plug and tighten it securely.
8. Dispose of any used fluid responsibly, and clean up any spills.
It's important to note that the specific steps may vary depending on the exact year and model of your Citroen C5, so always refer to your vehicle's owner's manual for model-specific instructions. Additionally, if you're not comfortable performing this task yourself, it's advisable to have the gearbox fluid checked by a qualified mechanic.