2008 LEXUS LS460L Vehicle Speed Control Problems

WE HAD LACK OF POWER ENGINE AND STEERING PROBLEMS IN THE PAST WITH THIS VEHICLE. WE FILED A LEMON LAW AND SUPPOSEDLY THEY FIXED IT. NOW THE PCS, VSC, ANTI SKID, AIR BAGS, BRAKES, ANTI-LOCK BRAKES AND OTHER ALARMS CAME ON AGAIN. THIS TIME THE BEEPING SOUND IS NOT ON CONTINUOUSLY BUT THE ALARMS ARE ON ALL THE TIME. THE POWER ASSIST ON THE BREAKS AND THE ANTI-LOCK BRAKE STOPPED WORKING ALL OF A SUDDEN. WE NOTED THE REAR DRIVER SIDE WINDOW WORKS OK, THE FRONT DRIVER SIDE WINDOW DOES NOT GO UP OR DOWN AUTOMATICALLY YOU HAVE TO KEEP THE BUTTON PRESSED, THE FRONT AND REAR PASSENGER WINDOWS DO NOT GO DOWN ALL THE WAY AND WHEN THEY GO UP THEY BOUNCE BACK HALF THE WAY. WE CHANGED THE BATTERY THINKING THAT WAS THE PROBLEM BUT THE PROBLEM CONTINUED. WE INSPECTED THE FLUID LEVELS AND ALL BREAKS AND ALL...

IN OCT OF 2011 BRAKES WOULD SEEM TO LOCK UP FOR NO APPARENT REASON...I TOOK LEXUS TO DEALER AND THEY COULD NOT ESTABLISH ANY REASON....THIS WOULD HAPPEN, SEVERAL TIMES, AGAIN AND AFTER STOPPING WOULD CLEAR UP AND DRIVE NORMALLY. THE LAST TIME IT STOPPED DEAD WHILE DRIVING IN CITY TRAFFIC AT AROUND 30 MPH SEVERAL DASH LIGHTS CAME ON SUCH AS; ABS, VSC, CHECK BRAKES, BRAKE MALFUNCTION. I WAS ABLE TO GET CAR TO GO AGAIN AND TOOK IT TO TORRENCE LEXUS FOR THEIR INSPECTION...THEY ARE WORKING ON NOW....MY WIFE WILL NOT DRIVE THE CAR FOR FEAR OF THE BRAKES LOCKING UP AT HIGH SPEEDS....I'M GETTING TO THAT POINT MYSELF. *TR