The ornamental design for a surface configuration of a radiator grill for a vehicle, as shown and described.
This application is related to co-pending application Ser. No. 29/129,138, of the inventor, filed on even date herewith and entitled "Surface Configuration of a Vehicle and Toy."
FIG. 1 is a perspective view from the right of a surface configuration of a radiator grill for a vehicle according to my novel design, the perspective view from the left being mirror symmetrical; and,
FIG. 2 is a front view of the surface configuration of a radiator grill for a vehicle according to my novel design.
The broken lines included depict environment and are not part of the claimed design.