The BMW 3 Series plays an important role in the BMW history. This documentary gives you an overview over six generations of the BMW 3 Series. Starting from 1975, every new model has its own characteristics, but always the same roots. The BMW 3 Series sedan is the latest representative of a long history.
My father had the 2002, the model just before the 1st generation 3 series. It was a good drive in comparison to the Japanese car at the time, but still very basic inside.
I have seen all the generation of 3 series as mentioned, but the latest version of 3 series is not in the article.
BMW built its empire from small car then moving to build big car (eg the first big car BMW was the 733i. In the 2002 era the biggest BMW was the 3.0s). In the early 70's all Mercedes had was its S class and E class size and the 190E took until the 80's before it emerged.
Pity I always wanted to buy a 3 series when I can afford it. In university my friends had the 2nd generation bought new by their parents and I was very envious. By the time when I can consider buying them, Chris Bangle laid his hands on the design and I don't think BMW is the same anymore.