You have to consider that thousands of people have gotten in and out of that car for the past few months. And I am sure that none of them cared how they did it. I am not too worried about it since I will be taking much better care of my car.
Everything I have read on a number of different Mustang sites say that there will be at least 150,000 units produced in the first year. I would hesitate to say that this is a limited production car.
At the top of this thread there is this link...