****** ******, the service manager, should hear about this SNAFU that you experienced, please call the service department and ask for him by name, if you haven't spoken to him already. For years he was the only person at a dealership that I would trust with my MINI, and now he takes excellent care of my smart car.
I do agree you need to use the P setting in the transmission along with the Parking Brake, and California law states that you must turn your wheels into the curb to prevent runaway vehicles. I use my parking brake in the garage even though it's relatively flat. Here, go to a flat surface, put your car in P but not the parking brake. If you can push the car without some resistance then there is something wrong and that needs replacing. Let them know.
In summary, sounds like they goofed. Good thing nobody was hurt. Now let's have an update and tell us all what happens next. Unless it's just your point to stir us all up into a frenzy until we march across the dealership with torches and rakes demanding their soul..
1.) What did they do when you reported this to the manager? Did they apologize?
2.) How did they rectify the problem? Did they treat you well and apologetically, or did they thumb their nose at you and tell you to go away?
There's been some changes at San Francisco lately, Bill Scott, who has been brand manager since Desiree returned to the Benz area of the dealership, will be departing so that he can spend more time off with his family and friends. I will surely miss his constant attention to detail and admirable disposition. I did meet the new brand manager and he seems like a considerate fellow. A different dynamic than Bill, but we'll see.
But I digress. Please let us know how this all pans out. I don't think your point is to start an anti-SF bashing session, but I do understand your frustration having had bad service --- NOT AT SMART, BUT ELSEWHERE -- in the past with other cars that I've owned.