The ornamental design for an automobile, as shown and described.
FIG. 1 is a front perspective view of an automobile showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof, a left side view being a mirror image thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof; and,
FIG. 7 is a rear perspective view thereof.
The portions of the automobile shown in broken lines, including the mirrors, the wipers, the wheels and the bottom surface of the automobile, are provided for illustrative purposes only and form no part of the claimed design.