PURCHASED A NEW 2016 FORD FLEX ON JULY 29, 2016, DROVE IT MOST OF THE DAY ON SATURDAY AND SMELLED EXHAUST FUMES MOSTLY EVERY TIME I EXILIRATED. WENTTO URGENT CARE SICK FROM EXHAUST FUME POISONING, GOT WORSE AS DAY WENT BY AND WENT TO A REGULAR HOSPITAL ER. BROUGHT VEHICLE BACK TO DEALER ON MONDAY AND AFTER THEM RESEARCHING THE PROBLEM, IT WAS FAULTY VENT IN REAR CAUSING EXHAUSTING TO ENTER INTO INTERIOR.