Beware of ANYONE wanting business and luring you in with 0% interest, no matter what model year it is.
When auto. financing interest rates are low, they will adjust the vehicle's price, or associated "fees" appropriately to bring the cost of the vehicle similar to what you would have paid if you had purchased a vehicle at 5% financing (just a number).
The only way to really "know" if you are getting a good deal is to have the dealerships fight over your business. I wish I could find the article but it was a good read regarding calling/emailing a few dealerships and informing them of a future purchase you have. Be sure to have the EXACT model (and most importantly all the extra's/addon's/features) in mind when you inform them that you will be comparing their "quote" with the other dealerships in the area to see who will get the sale. Either take that quote, or get a specific dealer to beat it if you want to give them your particular business (closer dealership, etc...). Be sure to tell them you are "shopping around".
Sure margins are slim, but do your homework and it'll pay off.