The ornamental design for an exteriorsurfaceconfiguration of a radiator grille, as shown and described.
FIG. 1 is a front view of an exterior surface configuration of a radiator
grille according to our novel design;
FIG. 2 is a left side view of an exterior surface configuration of a
radiator grille according to our novel design;
FIG. 3 is a perspective view from the front left of an exterior surface
configuration of a radiator grille according to our novel design; and,
FIG. 4 is a top view of an exterior surface configuration of a radiator
grille according to our novel design.
The broken lines shown in all drawing views are for illustrative purposes
only and form no part of the claimed design. The rear view is flat and
unornamented and not visible in use.