Maybe try
www.mbca.org for input
you know about the HARMONIC BALANCER and the SHOCK TOWER?
However: a few weeks ago a friend of mine was in town to visit his parents and we took out his fathers 2002 320 4-matic. Car has 86K miles and has had NO trouble, car was purchase STARMARK from a dealer. I think the father purchased the car in 2004
We were both surprised how nice a car it was, how well it drove. My friend is a BMW owner and runs a Ferrari race team so he drives lots of cars and they're a major part of his life. I was a bit surprised of his high praise for the car after having driven it.
One outstanding feature of the car is how stable the car - front particularly - during highway abrupt lane changes. Friend and I were guessing that the front -drive aspect really adds some benefits in dry conditions.