Auto accelerate car!

I was wondering if I could modify the unity demo car script so as to accelerate the car automatically. I should only steer the car.
Any suggestions?

	steer =Input.GetAxis("Horizontal");

Nope. You could try something like:

throttle = (1.0 - Mathf.Abs(Input.GetAxis("Horizontal")))* factor;  

Where ‘factor’ is a number between 0 and 1 that you define.