2004 Mercedes Benz C320

I HAVE A 2004 MERCEDES C320 THAT INCORRECTLY THOUGHT THAT IT NEEDED TO CUT POWER TO THE VEHICLE WHEN I WAS TURNING TO THE LEFT. IT DID THIS SEVERAL TIMES, I WOULD GUESS ABOUT 6 OR 7, FROM THE TIME I LEFT MY HOUSE UNTIL I TURNED AROUND AND PARKED IT IN THE GARAGE LESS THAN 1/2 MILE DRIVING DISTANCE. THESE WERE NOT ALL COMPLETE LEFT TURNS, MOST WERE CURVES TO THE LEFT. MY WIFE TOOK IT TO THE DEALER LATER THAT DAY, AND DECIDED NOT TO HAVE IT LOOKED INTO BECAUSE IT DID NOT DO IT TO HER AND "THE CAR WAS PERFORMING AS DESIGNED" ALSO SHE DECIDED SHE DID NOT WANT TO PAY FOR A DIAGNOSTIC THAT WOULD NOT PRODUCE ANY FAULTS. IT HAS NOT DONE IT SINCE, ABOUT 2 WEEKS NOW, BUT I CONTINUE TO BE CONCERNED THAT IT WILL RECUR IN A MORE SERIOUS SITUATION. THE DEALER KEEPS SAYING THAT THE CAR IS WORKING PROPERLY BECAUSE THE WARNING LIGHT CAME ON AND THE VEHICLE CUT POWER AS IT SHOULD WHEN IT DETECTS ONE OF SEVERAL CONDITIONS THAT WOULD CAUSE LOSS OF CONTROL. THE ONLY PROBLEM WITH THIS IS THAT THERE WAS NO CONDITION TO CAUSE LOSS OF CONTROL. THE TIRES WERE NOT ABOUT TO SPIN AND THE YAW OR WHATEVER IT IS WAS NORMAL. THE DEALER ALSO KEEPS SUGGESTING THAT I DISENGAGE THE ESC IF I DO NOT WANT IT. I THINK THIS IS IRRESPONSIBLE ADVISE, THE ESC IS A VERY IMPORTANT SAFETY DEVICE THAT I DO NOT REALLY WANT TO DISENGAGE, BUT I ALSO DO NOT WANT IT TO ENGAGE INCORRECTLY IN A CRITICAL SITUATION. *TR