Define game object.

I am trying to define a gameobject and then enable/disable components, my script goes as follows:

 using UnityEngine;
 using UnitySampleAssets.CrossPlatformInput;
 
 namespace UnitySampleAssets.Vehicles.Car
 {
     [RequireComponent(typeof (CarController))]
     public class CarUserControl : MonoBehaviour
     {
         private CarController car; // the car controller we want to use
         private Object wfr;
         private Object wfl;
         private Object wbl;
         private Object wbr;
         public Transform to;
         public float speed = 0.1F;
         public Transform from;
 
 
             private void Awake()
         {
             // get the car controller
             car = GetComponent<CarController>();
             wfr = GameObject.Find("/Car/WheelHubFrontRight");
             wfl = GameObject.Find("/Car/WheelHubFrontLeft");
             wbr = GameObject.Find("/Car/WheelHubRearRight");
             wbl = GameObject.Find("/Car/WheelHubRearLeft");
 
         }
 
         public void Update()
         {
             if (Input.GetKeyDown ("h")) {
                 ((MonoBehaviour)wfr.GetComponent("Lerp")).enabled = true;
 
                         }
         }
 
 
         public void FixedUpdate()
         {
             // pass the input to the car!
             float h = CrossPlatformInputManager.GetAxis("Horizontal");
             float v = CrossPlatformInputManager.GetAxis("Vertical");
 
             car.Move(h, v);
         }
     }
 }

Any help?