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 elevational view thereof;
FIG. 5 is an enlarged front perspective view thereof;
FIG. 6 is an enlarged front elevational view thereof;
FIG. 7 is an enlarged side elevational view thereof;
FIG. 8 is an enlarged top plan view; 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.