I'm want to purchase a used M3 but need to know more about them. What is in the sport package? What years was it available? Was it ever standard? I drove a '97 four door that had the red and blue emblems on the seats but the sport package was not listed on the original window sticker. I also drove a '95 and it seemed quite different. The '97 four door had more torque and softer suspension The '95 felt like it had lower stiffer suspension. Are these differences typical? Can someone explain the year model and sport package variations or direct me to a resource for such info.