"B.o.b." , you didn't get your Brabus in Cincy after all, you went to Columbus Ohio. My question is: Why would the Columbus dealer give you 'free stuff' when it was the Cincy dealer that is accused of screwing up? In that aspect, as I see it, Columbus doesn't owe you anything.
Now as for the greasy oil pan, that's why you have a warranty. And the way you're paying for your car really has no relevance. Cash, loan, gold bars, doesn't matter.
Can we move on now?