This vehicle is most probably a FAUNL 450 or L 500. Both were made from 1936 to 1939. They were nearly identical constructed except the payload. This vehicle had the radiator grille used before 1938.
This FAUN L 450 resp. L 500 had the older radiator grille, too. The photo was made in the second half of the war.
Beginning in 1938, the FAUN L 450 and L 500 were delivered with the new, slightly angular radiator grille. Typical for the new grille were the division bar and the triangular FAUN logo.