I also wondered about the two features you describe and wasn't able to make them work.
With cornering lights I assume you mean the beams will pivot away from their normal direction when the car begins to turn away from its straight trajectory or one actions the turn signal.
Adaptive high-beam headlamps are reported as available on the B:
http://techcenter.mercedes-benz.com/en/adaptive_high_beam_assist/detail.html
and a way to disable the feature.
However, cornering lights don’t seem available on the B class:
http://techcenter.mercedes-benz.com/en/cornering_light/detail.html
I find the low-beam headlamps "very low" and I often switch to high beams when driving in residential areas with no street lighting.