To be really fair, the 80s were dominated by the 2 models : W123 and 126. The 124s came in somewhere the later half of the mid 80s : 1986 if I'm not mistaken. Then again, for the sake of debate, is it really fair to compare the 123 vs the 126 as they are both from different classes?
Had the topic been, which was the best MB produced in the 20th century, would your opinions be any different?
126 tailed by a 203, 129 leading the pack.