2010 Lexus Es

1.WHEN BACKING OUT OF THE GARAGE, THE BACKUP SENSOR SOMETIMES STARTS BEEPING WHEN THERE IS NOTHING BEHIND THE VEHICLE. 2.DRIVING CAR ON DAN RYAN EXPRESSWAY. PRESSING LEFT SIDE BUTTONS ON STEERING WHEEL, ATTEMPTING TO CHANGE THE SOUND LEVEL, CHANNEL, OR RADIO MODE (FM1,FM2,AM, ETC.). INSTEAD, NOTHING MAY RESPOND, OR RIGHT SIDE BUTTONS RESPOND; I.E., CAR BEGAN DIALING A PHONE NUMBER (USING BLUETOOTH). TOOK CAR TO MY DEALERSHIP, ORLAND PARK LEXUS OF IL ON NOVEMBER 20, 2017. WAS ADVISED THERE IS NOTHING THEY CAN DO BECAUSE NEITHER OF THESE PROBLEMS HAS OCCURRED IN THEIR PRESENCE. I HAD PREVIOUSLY PAID FOR AN ELECTRONICS TESTING CHECK UP JUST BEFORE MY 7 YEAR EXTENDED WARRANTY EXPIRED (NOVEMBER 2017). I INDICATED THESE SAME TYPES OF CONCERNS. THEY HAD NOT KEPT OF RECORD OF THIS, STATING THEY DID NOT SEE ANY OF THE PROBLEMS THEN EITHER, SO THE CHECK-OUT SHEET (BASED ON MY INITIALLY EXPRESSED CONCERNS) WERE REFLECTED ANY WHERE IN THEIR RECORDS. INSTEAD, THEY TOOK OFF THE COST OF THE CAR REVIEW PRICE (WHEN THEY FIXED OTHER THINGS). THUS ERASING ANY RECORD OF MY EXPRESSING CONCERNS RELATED TO THESE ISSUES. THEY ALSO SAID IT MIGHT INDICATE A COMPUTER ISSUE, BUT AS THERE WAS NO PROBLEM WHEN SEEN AT THEIR SHOP, NO RECORD IS BEING KEPT. I ASKED WHAT THE PRICE MIGHT BE TO REPLACE THE COMPUTER. THEY INDICATED NOT KNOWING. I HAVE NO RECORDS TO 'UPLOAD'. I AM CONCERNED THAT IF I HAD PROBLEMS WHILE DRIVING, WHAT IF MY PHONE IS THE NEXT THING TO GO OUT? CHICAGO AREA STREETS ARE NOT THAT SAFE.