I´m getting cannot find symbol error in my code (symbol: method `setAr(boolean)`).

Here is my `Main.java` file:

```
class Vehicle {
    protected int marchs;
    protected int rode;
    public void xydar(int km) { System.out.print("\nxydei "+ km +" km!"); }
}
class Car extends Vehicle {
    public Car() { this.rode = 4; }
    public void xydar(int km) {
    super.xydar(km);
    System.out.println(" Estou de car!");
    }
}
class CarLux extends Car {
    private boolean ar;
    public CarLux() { this.ar = true; }
    public void setAr(boolean newAr) { this.ar = newAr; }
    public void xydar(int km) {
        super.xydar(km);
        if (this.ar)
        System.out.println(" ON!");
        else System.out.println(" OFF!");
    }
}
public class Main {
public static void main(String []args) {
    Vehicle moto = new Vehicle();
    moto.xydar(90);
    Vehicle car1 = new Car();
    car1.xydar(100);
    Vehicle car2 = new CarLux();
    car2.xydar(400);
    car2.setAr(false);
    car2.xydar(400);
    }
}

```

How can I call `setAr()` method correctly? Can anyone help me? I´m new to Java.
Thanks in advance.