After reading the manual I see that Dynamic Traction Control is not Dynamic Stability Control. They both are activated and deactivated through the console button and use the same yellow warning light. That was confusing to me. Traction Control is only used occasional with loose surfaces, but Dynamic Stability Control you want on all the time. I think I got it figured out now. (2011 Manual pages 94 and 95 DTC and DSC)
2011 535i X Drive - Space Gray, Black Dakota Leather, Dark Wood Trim, Sport Package, Sport Transmission, Dynamic Handling Package, Cold Weather Package, Active Seat Ventilation, Premium Packages 1&2, Smartphone Integration.
2012 BMW R1200RT light magnesium, Sport/Touring Motorcycle