You and a whole bunch of other folks on this thread, wtih apparently minimal or non-existent knowledge of the auto industry, have a serious misunderstanding of what's going on here.
The plant manager is simply giving preferential parking to employees who DO drive the company's cars.
And what better way is there to learn about a customer's concerns than to drive the same car the customer drives?
If you're the guy who say installs seats, and your seat comes loose and rattles, wouldn't you conclude you have a means of fixing that?
It should tell Ford something when their employees would rather drive something else, even with hugh discounts.