Aquanta. You may be a very polite person, but sometimes that just will not work. Why deal with the underlings? Talk to the GM and the Service Manager only.
Raise HELL! and don't even acknowledge their reasons. Go in, and in front of other customers, raise your voice. Make it so uncomfortable for them that they shudder when your drive up.
The above method works very well, and it's fun too!
Standing your ground helps all of us other Smart owners avoid dealer traps. These are, after all, car dealers, and even Smart dealers can't seem to change their stripes. A2Jack.