1. Open the bonnet or hood of your Renault Espace.
2. Locate the power steering fluid reservoir, which should be a semi-transparent plastic container with a black or yellow cap marked "POWER STEERING FLUID".
3. The reservoir is usually situated on the passenger side of the engine bay.
4. It may be covered by a protective cover, which can be removed by gently prying it off.
5. You can access the reservoir cap once the cover is removed by turning it counterclockwise.
6. Check the power steering fluid level inside the reservoir. It should be between the "MIN" and "MAX" marks on the reservoir.
Remember, the exact location of the power steering reservoir may vary depending on the specific model and year of your Renault Espace. If you have difficulty finding it or accessing it, consult the vehicle's owner's manual for more detailed information.