Self leveling suspension and active drive (questions)

[mtech8]

I've done a search and saw a few threads that talk about this. But I haven't seen anything concrete (even on BMW's website).

(1) I must have/order "3rd row seats" to get self-leveling suspension?

(2) The 128's can only be installed with self-leveling suspension?

(3) Active drive is essentially the sports suspension?

(4) What is the difference between active drive and self-leveling? How does it really affect ride quality?

Thanks for the help. I'm seriously considering trading in my 4.8 for a 35d and am figuring out what I really want this time around. If possible, I want to get rid of the 3rd row seats.