Znalazlem to na innym forum: "I was one of those who did this mod (2006 525i Manual), it improved the throttle response, but the steering remained unaffected. Changed the FDC_ID_MONITOR and FDC_VERBAUT in KOMBI module to aktiv, but still did not make any difference. Finally I dug into the SGM module, found SERVOTRONIK already set to activ, but FAHR_DYNAMIK_CONTROL was set to nicht_aktiv. Changed it to aktiv, went out for a test drive and ... voila, the steering now became much heavier as soon as I turned on the sport mode."