my car enter script lags the first person because car camera doesn't turn off for some reason

   var player : Transform;
   var exitPoint : Transform; 
   var doorTriggerLeft : Transform;
   var PlayerCamera : Camera;
   var CarCamera : Camera; 
   var isPlayerVisible : boolean;
   var driving : boolean;
   
  
 
   function Update()
   {
   if(driving){
   isPlayerVisible = true;
   }
   if (Input.GetKeyDown("f")&& isPlayerVisible) 
   {
   driving = !driving;
  if(driving){
  
   player.gameObject.active = false;
  
   player.parent = exitPoint.transform;
   player.transform.localPosition = Vector3(0,0,0);
  
   exitPoint.parent = car.transform;
   exitPoint.transform.localPosition = Vector3(-1,5,0); 
  
   car.GetComponent("DrivingScript").enabled=true;
   car.GetComponent("Carflip").enabled=true;
   PlayerCamera.enabled = false; 
   CarCamera.enabled = true;
   CarCamera.active = true;
   }
   else
   {
   
   player.gameObject.active = true;
  
   player.transform.parent = null;
  
  
   exitPoint.parent = car.transform;
  
   car.GetComponent("DrivingScript").enabled=false;
   car.GetComponent("Carflip").enabled=false;
   CarCamera.enabled = false;
   CarCamera.active = false;
   PlayerCamera.enabled = true; 
   
   }
   }
   }
   
   function OnTriggerEnter(Player : Collider)
   {
   isPlayerVisible = true;
   }
   
   function OnTriggerExit(Player : Collider)
   {
   isPlayerVisible = false;
   }