Although it seems like it has no effect (I thought so too), I stumbled upon some new evidence that may answer this discussion in a more visual form. To say the least I think all the responses are valid, but need some clarity in terms of visuals.
Originally Posted by HIRISC
I have the M Sport Package (337) - which includes the self leveling (air/rear) suspension (220). Has no impact on ride comfort (bump comfort). It's a load thing.
Adaptive Drive (2VA) is an altogether different option. I have this. I like it.
From BMW: "Adaptive Drive instantly adjusts the suspension settings of the wheels on one side to practically eliminate any perceptible unevenness in the road. In addition, you can choose between a more comfortable default setting for the suspension, or a more sporting setting."
BMW and Mercedes Build Beta Products!
Lexus build Release Candidate Products!
Why does this matter?
CAUSE EVERY TIME someone says Lexus has better build quality, one should consider what Toyota their Lexus Engine and chassis platform comes out of and how long that part has been tested in the real world!