As used in this article, the following terms shall have the meanings indicated:
SERVICE
The furnishing of gasoline, oil, air and water, the changing and repair of tires, the furnishing of accessories or the making of repairs to the automobile or vehicle of any kind whatsoever.
It shall be unlawful for any person to service any automobile or other vehicle upon any sidewalk whereby such sidewalk shall be blocked or obstructed, wholly or in part, to pedestrian traffic.