2009 BMW X6 Unknown Or Other Problems

I WAS DRIVING HOME I LOST POWER IN MY ENGINE MY RADIATOR FAN WAS EXTREMELY HIGH THE GATE IS GOING UP AND DOWN WHEN THE CAR WAS COLD AND MY OBD GOT BURN OUT

I TOOK MY 2009 BMW X6 TO THE BMW DEALER, UNION CITY GA FOR 3 PURPOSES: SUSPECTED LEAK OF COOLANT; CHECK ENGINE LIGHT ON; AND EXCESSIVE SMOKE COMING FROM BOTH EXHAUST PIPES. SPOKE WITH/COMMUNICATED VIA EMAIL WITH BMW SVC REP, WENT OVER DOCUMENTED CONCERNS...TO INCLUDE SMOKE FROM BOTH EXHAUST PIPES; RECEIVED DOCUMENT FOR APPROVAL; WHICH I APPROVED. RECEIVED VEHICLE 3 DAYS LATER, RETURNING HOME WITH VEHICLE TO OBSERVE SMOKE 'EXCESSIVE' FROM BOTH EXHAUST PIPES. RETURNED VEHICLE, TO BE TOLD BY SVC MGR, "I'M SORRY, I CAN ONLY REPRIMAND SVC REP, AS THE WORK THAT WAS DONE WOULD NOT CORRECT SMOKE FROM EXHAUST." THEN, SVC MGR WENT ON TO SPEAK OF THE CLASS ACTION LAW SUIT THAT ADDRESSED THIS PROBLEM, BUT THE TIMEFRAME TO HAVE THIS CORRECTED (FOR FREE) HAD EXPIRED 'BY DATE"...AND THIS INFORMATION IS USUALLY SENT TO THE ORIGINAL OWNER. AS I EXPRESSED TO HIM, I AM THE 4TH...