Camera Lean

I have made a script that is intended to make the camera lean using controls and effects similar to amnesia. Although when I attach the script to a camera it has no errors in the console but pressing q and e have no effect. Please help!! Thanks guys

Code:

 using UnityEngine;
 using System.Collections;
 
 public class Lean : MonoBehaviour {
 
     
     public float leanAngle = 35.0f;
     public float leanSpeed = 5.0f;
     public float leanBackSpeed = 6.0f;
     
     void  Update (){
         if (Input.GetKey(KeyCode.Q)) {
             LeanLeft();
         }
         
         else if (Input.GetKey(KeyCode.E)) {
             LeanRight();
         }
         
         else
         {
             LeanBack();
         }
     }
     
     void  LeanLeft (){
         // current Z-rotation
         float currAngle = transform.rotation.eulerAngles.z;
         //Quaternion rot = transform.rotation;
         
         // target Z-rotation
         float targetAngle = leanAngle;
         
         if ( currAngle > 180.0f )
         {
             //targetAngle = 0.0f - leanAngle;
             currAngle = 360 - currAngle;
         }
         
         //lerp value from current to target
         float angle = Mathf.Lerp( currAngle, targetAngle, leanSpeed * Time.deltaTime );
         
         //Debug.Log ( "Left : currAngle " + currAngle + " : targetAngle " + targetAngle + " : angle " + angle );
 
         // rotate char
         Quaternion rotAngle = Quaternion.Euler( transform.rotation.eulerAngles.x, transform.rotation.eulerAngles.y, angle );
         transform.rotation = rotAngle;
     }
     
     void  LeanRight (){
         // current Z-rotation
         float currAngle = transform.rotation.eulerAngles.z;
         
         // target Z-rotation
         float targetAngle = leanAngle - 360.0f;
         
         if ( currAngle > 180.0f )
         {
             targetAngle = 360.0f - leanAngle;
         }
         
         //lerp value from current to target
         float angle = Mathf.Lerp( currAngle, targetAngle, leanSpeed * Time.deltaTime );
         
         //Debug.Log ( "Right : currAngle " + currAngle + " : targetAngle " + targetAngle + " : angle " + angle );
         
         // rotate char
         Quaternion rotAngle = Quaternion.Euler( transform.rotation.eulerAngles.x, transform.rotation.eulerAngles.y, angle );
         transform.rotation = rotAngle;
         
     }
     
     void  LeanBack (){
         // current Z-rotation
         float currAngle = transform.rotation.eulerAngles.z;
         
         // target Z-rotation
         float targetAngle = 0.0f;
         
         if ( currAngle > 180.0f )
         {
             targetAngle = 360.0f;
         }
         
         //lerp value from current to target
         float angle = Mathf.Lerp( currAngle, targetAngle, leanBackSpeed * Time.deltaTime );
         
         //Debug.Log ( "Center : currAngle " + currAngle + " : targetAngle " + targetAngle + " : angle " + angle );
         
         Quaternion rotAngle = Quaternion.Euler( transform.rotation.eulerAngles.x, transform.rotation.eulerAngles.y, angle );
         transform.rotation = rotAngle;
     }
     [RPC]
     void  Test (){}
 }