The ornamental design for an automobileheadlight, as shown and described.
FIG. 1 is a top view of an automobile headlight;
FIG. 2 is a front view thereof;
FIG. 3 is a left side view thereof; and,
FIG. 4 is a perspective view thereof.
The broken lines are included to show environmental structure and form no part of the claimed design. The drawings and descriptions represent the left side embodiment. The claim is also for a mirror image right side embodiment.