no way to disable the light unless you code it out i think.
For the traction issue, could be the tires are brand new and there is some break in period for them.
328| ZPP | ZSP | ZCW | CA | 6FL | NAV | XENONS | 18x8.5 VB3s ET30/25
2011 Jet Black
535i xdrive | ZPP | ZSP | ZCW | 6FL | NAV | 331s Square