This vehicle isn't offered in the US, but I will try to help. Here is a link that explains in general how a thermostat is replaced. Take a look through it. It should help you.
Let me know if that helps or if you have other questions.
Take care,
Joe
May 26, 2020 at 8:49 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.