extending car class from car tutorial

I'm trying to extend the Car class found in the car tutorial. I get the error line 23: expecting }, found 'wheels'. line 618: expecting EOF, found '}'

When I take away the surrounding "class Car extends Controllable{ }", it works fine. When I try extending MonoBehaviour/Behaviour/rigidbody I get the same error.

==== Controllable.js =====

 #pragma strict
 public var isPlayer:boolean=false;
 protected var mouse_sensitivity:float=1000;

=============================

 class Car extends Controllable{
 
  private var wheelRadius : float = 0.4;
  var suspensionRange : float = 0.1;
  var suspensionDamper : float = 50;
  var suspensionSpringFront : float = 18500;
  var suspensionSpringRear : float = 9000;
  
  public var brakeLights : Material;
  
  var dragMultiplier : Vector3 = new Vector3(2, 5, 1);
  
  var throttle : float = 0; 
  private var steer : float = 0;
  private var handbrake : boolean = false;
  
  var centerOfMass : Transform;
  
  var frontWheels : Transform[];
  var rearWheels : Transform[];
  
  private var wheels : Wheel[];
  wheels = new Wheel[frontWheels.Length + rearWheels.Length];