The W107-046 chassis 500SL Roadster with the M117-960 motor was made between 1980 and 1981 (Early go hard version).
The W107-046 chassis 500SL Roadster with the M117-962 motor was made between 1982 and 1985 (Later not so good version.).
The W107-046 chassis 500SL Roadster with the M117-964 motor was made between 1985 and 1989 (Even later ke injection.).