DUDE?!?!
Go get "your" car. It's "your" order, "your" car. Let the dealership order "their" own car to sit on "their" showroom floor. To me, that's just wrong!!!

Think about how many people are going to be walking/running by it, hopefully not scratching it, sitting in it, bringing the kids to come see and sit/play in it.
For me: NO THANKS!

Either that, or like others have stated.
TELL them you
WANT more money off "your" car for advertising.
Sorry, just had to vent. At least you know your car is complete. GOOD LUCK!!!