The ornamental design for an automobile, as shown and described.
FIG. 1 is a left, front perspective view of an automobile showing my new design;
FIG. 2 is a left, rear perspective view thereof;
FIG. 3 is a left side elevation view thereof, the rear view being a mirror image thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a front elevation view thereof; and,
FIG. 6 is a rear elevation view thereof.
The claimed design is indicated by the relatively dark portions in the figures, while the relatively light portions are environmental and form no part of the claimed design.