The ornamental design for an automobilefrontgrille, as shown and described.
FIG. 1 is a front and right side perspective view of the automobile front grille showing my new design;
FIG. 2 is a rear and left side perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a right side elevation view thereof;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a front and right side perspective view thereof, wherein the automobile front grille is shown installed on environmental automobile.
In FIG. 8, the overexposed or halftone showing of the automobile is provided for the purposes of illustrating environmental structure and forms no part of the claimed design.