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 rear perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a right side view thereof, the left side being a mirror image; and,
FIG. 6 is a top plan view thereof.