The ornamental design for an automobilegrille, as shown and described.
FIG. 1 is a front perspective of an automobile grille showing my new design;
FIG. 2 is a front perspective view thereof;
FIG. 3 is a right side elevational view thereof; and,
FIG. 4 is a left side elevational view thereof.
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.