I’ve never been much interested in the inner workings of a car dealership, and since watching the Purple Rose Theatre’s latest play, The Classic King, I can’t say that has changed. The comedy, which runs until March 15, follows four car salesmen on a mission to save their failing dealership. Directed by Jeff Daniels, the show is a world premiere and the first professionally produced play by Richard Johnson. Johnson began playwriting after retiring from a career as an automotive journalist, including serving as editor of Automotive News.