The ornamental design for a portion of an automobile, as shown and described.
FIG. 1 is a front perspective view of a portion of an automobile showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a side elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof; and,
FIG. 6 is a top plan view thereof.
The portion of the automobile in light contrast is environment and forms no part of the claimed design. The bottom view of the portion of the automobile forms no part of the claimed design. Our design includes the mirror image of the embodiment depicted.