I made my own car and as you can see in the video the car flips when starting the scene. After starting the scene in the video i did not press anything but the car seems to drive on its own while doing a flip. Would be glad if you can help me.
I see the wheels mesh transpassing the box. Where you add the wheels collider?
I made 4 empty objects and placed the in the middle of each wheel. After that I attached a wheel collider to each empty object and made them as big as the wheels.
Watching the video is difficult to see what is really happening.
Send the project, if you want.
check the weight of your car, it should be a high value (like 1000)