The ornamental design for an automobilefrontgrille, as shown and described.
FIG. 1 is a front perspective view of an automobile front grille showing our new design on an automobile;
FIG. 2 is a side elevational view thereof;
FIG. 3 is an opposite side elevational view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is an enlarge front perspective view thereof;
FIG. 6 is an enlarge front elevational view thereof;
FIG. 7 is an enlarge side elevational view thereof;
FIG. 8 is an enlarge top plan view thereof; and,
FIG. 9 is an enlarged rear elevational view thereof.
It will be understood that the broken lines shown in the drawings illustrate portions of the automobile front grille that form no part of claimed design.