I think this is a circa 1972 Mercedes-Benz SL or SLC.
The Mercedes-Benz R107 and C107 are automobiles which were produced by Mercedes-Benz from 1971 through 1989, being the second longest single series ever produced by the automaker, after the G-Class. They were sold under the SL (R107) and SLC (C107) model names as the 280 SL, 280 SLC, 300 SL, 350SL, 420SL, 450SL, 500SL and 560 SL.