2011 BMW X6 Unknown Or Other Problems

While driving the check engine light came on moments later the steering wheel stiffened up then released mid turn when I turn the steering wheel the tires didn’t respond I hit a curb

AFTER THE CAR IS BEEN DRIVEN UNDER A SNOW STORM , WHEN THE SNOW IS NOT CLEAR HAVE TO DRIVE TO WRK 1 HOUR AWAY , THE NEXT DAY ONCE ALL SNOW IS CLEAR THE CAR TENDS TO SHAKE VERY BAD , EVERY TIME THE SAME WHEN U HIT 30MPH SHAKES VIOLENTLY LIKE THE CAR IS GONNA BREAK APART. BUT ONCE U TAKE IT INSIDE THE CARWSSH AND WASH IT TENDS TO GO AWAY? I DON'T UNDERSTAND IT? IT'S NOT THE SNOW ON THE TIRES CUZ I CLEAR ALL THAT BEFORE , I LEAVE THE HOUSE THE NEXT DAY.

WHILE IN TRAFFIC DRIVING AROUND 45 MILES PER HOUR AT 8A ON DEC 7, 2015 ON GA400 MY 2011 BMW X6 HYBRID REAR GLASS SPARKED WITH FIRE AND SHATTERED. THE SPARKS WERE FOLLOWED BY A VERY LOUD BOOMING NOISE. THE DEFROST CONNECTOR EXPLODED APPARENTLY IN THE REAR WINDOW CAUSING REAR GLASS TO SHATTER. PICTURES ATTACHED. YOU CAN CLEARLY SEE WHERE THE EXPLOSION/SPARK OCCURRED AND WHERE THE DAMAGE STARTED. CAR IS AT DEALER NOW AND THEY HAVE TOLD ME IT IS NOT COVERED. ISSUE IS DEFROST FAILURE. CAR IS UNDER FULL FACTORY WARRANTY. THE TINT MOSTLY HELD THE GLASS IN PLACE. PROBLEM AFTER PROBLEMS WITH THIS CAR. HYBRID BATTERY REPLACED AT 18K MILES. ENGINE ISSUES. BATTERY NODE ISSUES. 43K MILES CURRENTLY. PURCHASED IN 2013 WITH 3K MILES ON IT.