Pressing a Button to Go to Specific Point on NavMesh

Hi there

In my application the user is inside a car, he has 4 buttons labeled A, B, C, D (see image). I want the car/user to move to a specific point based on the button he presses.

I have barely any experience with coding so I could really use some help. I do already have a NavMesh which outlines the route for the users car. (see image).

Thank you