The ornamental design for an automobile, as shown and described.
FIG. 1 is a front perspective view of an automobile in accordance with my design;
FIG. 2 is a rear perspective view of the automobile shown in FIG. 1;
FIG. 3 is a right side elevational view with the left side elevational view being substantially identical;
FIG. 4 is a rear elevational view; and,
FIG. 5 is a front elevational view.
The portions of the vehicle shown in broken lines throughout the drawing views are for illustrative purposes only and form no part of the claimed design.