Well I think the reason mercedes and such give their cars letters and numbers is because they don't want anyone to disassociate from the brand MERCEDES. They want every car they put on the road to be a mercedes, not anything else by giving it a name. It works for them, because when you think mercedes you think luxury...the end. People don't typically think of chevy on its own, they refer to the car and associate things with the name of the car.
When you see a Cobalt, you don't think of the same thing as if you saw a Corvette.
What I'm saying is, it could work for Lincoln.....Chevy not so much. If they're trying to put emphasis on the brand, then go for it. Seeing has how Lincoln is typically marketed towards a more mature refined audience, is it not?