YEs, they do oil changes, warranty work, etc. HEck, they are the dealership affiliated with the National Headquarters of Smart, which is in Bloomfield Hills, so they are constantly being monitored, probably much more than most dealerships, or at least I would expect that to be true.
I have been impressed with everybody there from the Service Manager down to the snow removal guys..>(grin)
They have even assisted me by putting on tires, wheels and hubcaps that I had bought out of Canada back in January when I wanted winter tires on my care before driving it home.
I've been very pleased.