I ended up looking on the underside of the rear suspension and I do in fact have it. I guess its kinda a perk now since when I bought the vehicle I didn't know it had it or was even an option for that matter.

It appears you are absolutely correct.

Self leveling suspension is standard. 3rd row seats are optional. You get self leveling suspension even if you have 3rd row seats or not. FYI… adaptive drive is well worth the extra $3500.

Self leveling is not standard. See attached. 2 with and one without.

Of the two example builds in the attached PDF, the 2011 35d without 220 does not have 4UB, while the one with 220 has 4UB. So these examples support the statement, at least with the 2011 35d, that 220 is not standard and is added with 4UB (unless something else deletes 220?). This however does not explain how some people have a 2011 35d without 4UB but with 220, didn't explicitly option 220, and still got it as a no charge option, such as Marshotel's 2011 35d as noted here http://www.bimmerfest.com/forums/showthread.php?p=5939165&highlight=#post5939165
and here
http://www.xoutpost.com/bmw-sav-forums/x5-e70-forum/79535-self-leveling-rear-suspension-need-help-2.html#post813320
:dunno:

In my example of a 2012 50i, it seems 220 is standard, as noted here http://www.bimmerfest.com/forums/showthread.php?p=5950516&highlight=#post5950516
:thumbup:

It also seems that 220 is not standard with the 2012 35i, as noted here http://www.bimmerfest.com/forums/showthread.php?p=5952167&highlight=#post5952167
:thumbdown

Also, in looking at the 2011 35d build sheet example with 220, I see option 220 is listed under "Order Options". My 2007 4.8i has option 220 listed under "Series Options", which again leads me to believe it is standard with the V8, but I am not certain if an option being under "Series Options" is indicative of it being "standard" for the given engine/model line.

I do wish that BMW would make this less confusing by making 220 more ubiquitous, or at the very least be more transparent as to when 220 is included. Back in 2007, the detailed specs on the web site made it clear that my 4.8i had the self-leveling suspension. Fast forward to 2011 where there is no mention of the 50i (the replacement for the 4.8i) having self-leveling, and with no definitive info to be found on the boards, required me to coax a dealer into doing a mock build for me to get the answer that nothing had changed! What a pain. :banghead:

They really do make it very confusing.

On a side note, does the 3rd row seat fold completely flat into the floor?

I'm looking for a used 2008-2010 and I don't need the 3rd row, but I am finding more used ones with it instead of without it.

Yes they do fold flat. The only downside to getting the 3rd row if you don't really want it is you lose the spare tire storage. Run flats are terrible tires so its nice to have a spare if you decide to remove them and get regular tires that last longer, are quieter, and ride better.

Strange and interesting. None of the three appear to have Adaptive Drive. So what triggers 220?

Strictly looking at these three vehicles, it would appear that either 4UB (3rd row) or 300 (spare tire) adds weight in the rear, and therefore includes 220. The two with 220 also have 330 (sports package).

Now I'm curious to know if I have 220; my X5d is a 2011 with minimal options, but I did order the sports package and spare. Unfortunately I will be separated from my X5d for a couple of months, so I am unable to look underneath.