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Message: <blockquote data-quote="E46Fanatic" data-source="post: 377814" data-attributes="member: 81">Actually not entirely true. AS varies the rack ratio only via a servo on the steering rack. Weight and road feedback feel of the steering remains the same. If you compare the steering rack of an A/S steering E90 vs. non the only difference is this servo and the additional sensors on the rack.  Best if you try both to see the difference.  The only "downside" with A/S is as what Schwepps said, the turn ratio is no longer linear which for purist drivers is something out of the ordinary.  Certainly for track driving you'll want something more predictable like a linear ratio vs a variable one esp. if you are not used to A/S.  Personally, after getting used to A/S I really like it, and based on the feedback I've seen from other owners on online forums, its a well liked feature to those who have tasted and gotten used to it.  Car feels a lot more agile and nimble esp in low speeds and very direct.  No of turns in low speed mode lock to lock is tight, and feels like some kinda race car or go kart, while on highspeed mode its more relaxed and not as tiring to drive over long distances.</blockquote>