Looks like your car has the transmission without all the vacuum shift controls. Linkage setup looks very much like the one on a 1977 300D with a lever running from the linkage back to the transmission. Probably better off without all the vacuum control junk. Like has been said, there are many variations of linkages, and even the parts manual is hard to decipher, as I found out when I tried to find a part for a 1981 240D but the manual did not show that particular setup.