2011 BMW 535I US Engine And Engine Cooling Problems

UPON ACCELERATION FROM A STANDSTILL, THERE IS A 1 SECOND DELAY FROM WHEN THE ACCELERATOR IS PRESSED TO WHEN THE CAR ACTUALLY MOVES FORWARD. THE HESITATION IS PRESENT WHEN MOVING, BUT NOT NEARLY AS PRONOUNCED AS FROM A STOP. THE ACCELERATION DELAY IS BOTH DANGEROUS AND FRUSTRATING. LIVING IN A HIGH TRAFFIC URBAN AREA WITH LOTS OF HILLS(SAN FRANCISCO), THE DELAY HAS CAUSED ME AND MY FAMILY TO COME CLOSE TO MANY TRAFFIC ACCIDENTS. I AM UNABLE TO ACCELERATE IMMEDIATELY FOR LEFT TURNS AND AM NEARLY T-BONED WITH MY WIFE FEARING FOR HER LIFE. THE PROBLEM IS CONSISTENT AND HAPPENS EVERY TIME. IT IS AN OBVIOUS DESIGN FLAW THAT BMW FAILS TO ADDRESS. TOOK THE CAR TO MY LOCAL BMW DEALER TO ADDRESS THE ISSUE. THEY REPLACED THE TORQUE CONVERTER, BUT THE PROBLEMS REMAINS. TOOK IT IN AGAIN. THIS TIME THE SERVICE MANAGER INSISTED IT WAS TURBO LAG. TEST DROVE...