The ornamental design for an automobile, as shown and described.
1. Automobile
1.1 : Perspective
1.2 : Front
1.3 : Back
1.4 : Left
1.5 : Top
The broken lines depict portions of the automobile that form no part of the claimed design; the fine lines on the drawings indicate the curved surface; reproduction 1.1 is a front perspective view of the automobile; reproduction 1.2 is a front view thereof; reproduction 1.3 is a back view thereof; reproduction 1.4 is a left view thereof where the right view is a mirror image; reproduction 1.5 is a top view thereof; the bottom view is omitted since it cannot be seen in use.