They were probably refering to the OEM original bolts that came on the car from the factory. They only allow a little adjustment. The aftermarket/OEM eccentric bolts will allow +/-1.5 degree adjustment which should be plenty to get you in spec. The OE p/n is just Mercedes putting their name on it and doubling the price. The Febi-Bilsteins are essentially the same bolts as the OEM Mercedes eccentrics. The Febi ones I got from AutohauzAZ were stamped with DYTSA which is a well respected vehicle bolt mfg. You're better off sticking with the Febi price wise.

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