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];

in your example it’s missed symbol ‘}’ at the script’s end