As used in this article, the following terms shall have the meanings indicated:
A building or portion of a building in which auto-body work or the overhauling or replacement of engines is conducted.
An area of land, including structures thereon, used for the servicing of motor vehicles, whose primary service is the retail sale of gasoline. This use may also include minor repairs such as replacing of mufflers and tail pipes, motor tune-ups, changing of tires, polishing, washing and lubrication, all of which are incidental to the primary service rendered. Auto-body work of any nature shall be excluded.