2007 LEXUS ES350 User Comment / Complaint

I own a 2007 lexus 350 purchased in sept of 2006. i have experienced problems with the transmission, at 3,000 miles which resulted in lexus replacing the transmiion. most recently i was driving on an interstate and while passing a car my car accelerated on it own to 140mpg. i was braking continuously for seven to ten minutes. i shifted from drive to neutral. this did not help. the car only slowed down with the pressure on the brakes. i contacted the dealer who picked up the car when i returned home and i was told that it was a floor mat issue my floor mat was put in by the dealership. i was injured and have since required surgery. in my opinion there is a serious safety issue with the vehicle.