The ornamental design for a headlampaccentpanel, as shown and described.
FIG. 1 is an environmental view of a vehicle showing a headlamp accent panel according to an embodiment of our new design for use on a first side of the vehicle;
FIG. 2 is a front perspective view of the headlamp accent panel shown in FIG. 1 without the environmental elements;
FIG. 3 is a front view of the headlamp accent panel shown in FIG. 2;
FIG. 4 is a top view of the headlamp accent panel shown in FIG. 2;
FIG. 5 is a left side view of the headlamp accent panel shown in FIG. 2;
FIG. 6 is a right side view of the headlamp accent panel shown in FIG. 2;
FIG. 7 is an environmental view of a vehicle showing a headlamp accent panel according to an embodiment of our new design for use on a second side of the vehicle;
FIG. 8 is a front perspective view of the headlamp accent panel shown in FIG. 7 without the environmental elements;
FIG. 9 is a front view of the headlamp accent panel shown in FIG. 8;
FIG. 10 is top view of the headlamp accent panel shown in FIG. 8;
FIG. 11 is a right side view of the headlamp accent panel shown in FIG. 8; and,
FIG. 12 is a left side view of the headlamp accent panel shown in FIG. 8.
The broken lines shown in the figures represent portions of the headlamp accent panel or surrounding environment that form no part of the claimed design.