smart Keys

I'm trying to get some additional keys for my smart 451. My dealer says that there are only two types available. The ones with the remote built in like the two that came with the car ($165 each + programming) and "flat" keys without the remote ($20 each). The dealer says the "flat" keys won't start the car and can't be programmed to enable them to start the car. Every other car I know of including my 07 VW Eos and my 06 Honda Ridgeline have "flat" keys available that can be programmed to start the car (I have them for both those vehicles). My question is "What good are keys if they won't start the car?" Can anybody help or provide more information?