2014 AUDI A7 Electrical System Problems

DRIVING ON THE FREEWAY AND ALL OF A SUDDEN STEERING WHEEL STOPS WORKING GETS SO STIFF THE ELECTRICAL STEERING WHEEL COLUM COMPONET STOPS WORKING.JUST ABOUT CRASHED. THANK GOODNESS NO ONE IN FREEWAY. TPS LIGHTS GOES ON. PAYED ALL THE DIAGNOISES AND SAYS WEEKS TO ORDER THE PART. SAYS DON'T DRIVE. RED WARNING LIGHT. DID 3 DIAGNOSIS AND ITS THE CPU COMPONET THAT CONTROLS THE DASHBOARD AND FLIP SCREEN REAR TAIL THAT SHOULD RAISE AT 75 I BELIEVE YOU HAVE TO CLICK THE BUTTON TO ACTIVATE IF THE CAR LETS YOU. NO SCREEN ON FLIP SCREEN WENT OUT WHEN DRIVING WITH GPS ON IN THE MIDDLE OF A STORM. THE TRACTION ON THE CAR IS OFF . AUDI SAYS 8,000 DOLLARS FOR THE STEERING WHEEL COMPONET THEY SAY VERY HARD AND EXPENSIVE TO FIX.