2010 BMW 1 SERIES Electrical System Problems

RADIO NOT ALWAYS GOING ON WHEN TURNED ON OR TURNING OFF BY ITSELF OR CHANGING STATIONS. ONGOING PROBLEM. BROUGHT TO DEALER WHO HAD ME WAIT FOR OVER 5 HRS. FOR THE "CONTROLLER" TO BE CHANGED. PROBLEM CONTINUED ALONG WITH ONE OCCASION OF LOUD BUZZING COMING FROM REAR OF VEHICLE. BROUGHT TO ATTENTION OF DEALER SEVERAL TIMES WHEN IN FOR SERVICING BUT WAS TOLD THERE WAS NO PROBLEM. DISCOVERED ONLY TOO LATE THAT I WAS BEYOND THE TIME OF FILING A COMPLAINT UNDER THE LEMON LAW. BROUGHT VEHICLE IT TO DEALER FOR APPRAISAL AND POSSIBLE "BUY BACK" BUT WAS OFFERED ONLY ABOUT HALF ITS VALUE. NOW I AM ENCOUNTERING PROBLEM OF "SERVICE ENGINE SOON" LIGHT GOING ON AND REMAINING ON (OVER SEVERAL THOUSAND MI.), PAID TO HAVE CHECKED BUT RECEIVED CODE ONLY. TIRED OF GOING AROUND IN CIRCLES WITH THIS CAR AND COMPANY SO AM NOW CONSIDERING TRADING WITH ANOTHER COMPANY....