Clears the transmission memory of your typical driving habits. Starts from zero again. You may feel a difference in the shifting, or you may not. The moment you start to drive again it begins to revert to how it was before you reset it, unless you change your driving style significantly.

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2007 X3 3.0si, 6 MT, Premium, White

Retired:
2008 535i, 6 MT, M Sport, Premium, Space Grey
2003 X5 3.0 Steptronic, Premium, Titanium Silver
2002 325xi 5 MT, Steel Grey
2004 Z4 3.0 Premium, Sport, SMG, Maldives Blue