Yes, a few years ago in some countries there was access to official ETK and TIS from BMW website and then spring table was available. Same think was briefly in Finland.

I think S1-S3 are the variants of the same specs like I said earlier. At this point I wouldn't worry about it and just install the springs.

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E39 530dA -02 M-Sport Messing metallic
E53 X5 3.0dA -06 Sport Stratus grey
E70 X5 40d -12 M-Sport Space grey