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.

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2008 X5 4.8
White w/ Black Interior w/ Bamboo Trim | Premium | Sports + 214" | Tech | Cold Weather | Rear Climate | Premium Sound | Active Vent Seats | Heads-Up | Comfort Access | 3rd Row | Aero Kit | Huper Optik Tint | Clear Reflectors