2011 BMW Z4 Electrical System Problems

Electrical power steering system failed, warning light came on. Vehicle suddenly became very difficult to impossible to steer. Failed to negotiate a turn and nearly hit a tree. I have an appointment set with an independent service dealer near me, but I’m afraid to drive it there, so I may have it towed. The warning light came on just moments before the initial failure.

ON 01/05/2012, BMW SERVICE CENTER REPLACED AN IDRIVE PART AND REPROGRAMMED THE CAR. WHEN I PICKED UP THE CAR, I NOTICED AC IS NOT WORKING. SERVICE CENTER TOOK IT BACK AND DID A MASTER RESET. AFTER THAT SEVERAL TIMES I HAD THE ISSUE AND THEY COULDN'T FIX IT. ON 07/15/2013, I NOTICED THE AC IS NOT WORKING. IT WAS 85F OUTSIDE. I CALLED THE SERVICE MANAGER AND DROVE THE CAR TO HIM. HE CHECKED THE CAR AND CONFIRMED AC IS NOT WORKING. THEY TOOK THE CAR AND GAVE ME A LOANER. NEXT DAY THEY FOUND SOME ERROR CODES STORED IN THE CAR. WHILE THEY ARE LOOKING INTO THE CODES, AC STARTED WORKING ALL ON ITS OWN. BMW SAYS THE ERROR CODES ARE BOGUS CODES AND INSTRUCTED THE SERVICE MANAGER TO CLEAR THE CODES AND RETURN THE CAR TO ME. SERVICE MANAGER IS DOING HIS BEST TO DIAGNOSE THE ISSUE. BUT...