013 300a 1951 1952 1953 1954 The W186-013 chassis 300a Cabriolet with the M186-920 motor was made between 1951 and 1954. 014 300b 1951 1952 1953 1954 1955 1956 The W186-014 chasis 300 Cabriolet with the M186-920 motor was made between 1951 and 1956.

033 300c 1955 1956 1957 The W186-033 chassis 300c Cabriolet with the M186-921 motor was made between 1955 and 1957 (Auto. trans.). The W186-033 chassis 300c Cabriolet with the M186-920 motor was made between 1955 and 1957 (Manual trans.).