2010 LEXUS ES350 Electrical System Problems

VEHICLE FAILED TO START WHEN PROPER PROCEDURE WAS FOLLOWED, THAT IS DEPRESSING THE BRAKE AND THEN WHEN GREEN LIGHT ILLUMINATES ON STARTER BUTTON ON DASHBOARD, PRESSING THAT BUTTON. THIS HAS HAPPENED OVER FIFTY TIMES. VEHICLE HAS BEEN INSPECTED AT LOCAL LEXUS DEALERSHIP OVER THE COURSE OF AT LEAST FIVE SEPARATE DAYS. A COMPREHENSIVE SET OF DIAGNOSTIC TESTS WERE PERFORMED AT DEALERSHIP DURING ONE OF THESE INSPECTIONS WHEN CAR FAILED TO START IN THEIR SERVICE DEPARTMENT WHILE TECHNICIAN WAS BEING OVERSEEN BY A DIAGNOSTIC EXPERT FROM THE DEALERSHIP. I WAS TOLD THEY COULD NOT FIND ANY PROBLEM, AND SHOULD CALL AGAIN IF IT SHOULD REOCCUR. THEY SAID THERE WAS NO RECORD OF THIS HAPPENING BEFORE SO THERE WAS NOTHING ELSE THEY COULD DO. DO YOU HAVE RECORD OF THIS HAPPENING WITH EITHER OTHER LEXUS OR ANY VEHICLES SIMILARLY EQUIPPED, AND IF SO ARE THERE ANY REPAIR STEPS THAT CAN BE UNDERTAKEN?...

THE CAR INTERMITTENTLY DOES NOT START. OCCURRED FOUR TIMES IN LESS THAN FIVE MONTHS. CAR BOUGHT NEW FROM DEALER LATE 4/2010. AFTER DRIVING CAR AROUND TO RUN ERRANDS, CAR DOES NOT START. BRAKE IS HARD, AND CHARGING SYSTEM WARNING SIGN APPEARS. SOS SAFETY FEATURE OFTEN DOES NOT OPERATE DURING THESE INSTANCES. FIRST OCCURRED 6/28/2010. ROADSIDE CALLED-REQUIRED BATTERY JUMP. DEALER EVALUATED CAR- CLAIMED NO ISSUES WITH CAR OR BATTERY. SECOND OCCURRENCE: 7/6/10. ROADSIDE CALLED. DEALER EVALUATED CAR FOR TWO WEEKS. THIRD OCCURRENCE HAPPENED WHILE AT DEALER. LEXUS TECHNICIAN WAS ABLE TO REPLICATE THE PROBLEM. TECHNICIAN THOUGHT THE CAR WAS NOT RECOGNIZING THE KEY. BATTERY FOR KEYS REPLACED. FOURTH OCCURRENCE- 8/31/10. ROADSIDE CALLED. BROUGHT TO DEALER. CLAIMS THERE ARE NO ISSUES WITH CAR, BUT CANNOT PROVIDE EXPLANATION WHY THIS IS OCCURRING OR GIVE ANY GUIDELINES TO PREVENT THE SITUATION FROM OCCURRING AGAIN. IN ALL INSTANCES THE CAR WAS NEVER COLD, SO BATTERY...