[Bill]

Yes, somewhat of an asshole. The service writers don't make the rules of the place. Hell, if your area is like mine, those rules probably don't even come from the dealership itself. They're trying to do the best they can with what they're forced to do.

Personally, I'd make another appointment, go back, get it done, and if they remember you leaving, tell them you had a sudden emergency you had to leave to take care of. Alternatively, buy the shit and do it yourself or go to a quick change place and pay for it.