and the car has to be black in color too and 2013 or newerThere's a very specific list of vehicles allowed on uber black... please do some research.
Here's a list of vehicles they allow for (black) LM plates
http://philapark.org/wp-content/uploads/2011/02/Luxury-Limousine-Approved-Vehilce-List.pdf
Keep in mind the Chrysler 300 is also no longer allowed.
As far as I'm aware those are fleet vehicles and uber has it's own list they allow which is much shorter than that (you obviously can't do black in a Toyota Camry)...