BMW’s xDrive at its Best

Here’s a video of BMW’s all-wheel-drive system, the xDrive, at work. There’s a lot of sliding, but the xDrive does a pretty good job considering the icy conditions the vehicles are in. Although with the sliding, it still seems to remain traction and does not fall too far off the road. The question now is: is it good enough to compete with the legendary Quattro all-wheel-drive from Audi?