You're doing several things wrong here. You don't need a
setget, and even if you did, you're not using it since you're trying to call the function instead of accessing the variable (which is what
setget is for: calling a function when a variable is accessed).
It's hard to tell exactly what is happening because of your formatting issues in your post (
_ character is for italics in text), but I think I see. You have an instance of a car scene that has another scene as a child, like so:
When you use
get_node(), you use node names not filenames.
car.tscn is a filename - it's where the scene is saved but has nothing to do with the node running in the live game. Since the car is the parent, you can use
Keep in mind, this will not work if it's in the child's
_ready() function, because child nodes become ready before parents.
Accessing nodes is frequently misunderstood by beginners. The following might help you avoid some of the common errors: