2007 mini cooper s hatchback. The windows, ac/heat controls, driving lights. and cigarette light work intermittently. In the beginning after 15 mins of driving all would come back on. Now it seems after about 45 mins. I brought it to my mechanic and he has been unable to diagnose the problem. He did check with the local dealer and was told to replace the battery which he did. The problem still remains. Has anyone experienced any of these symptoms? Right now we are at a loss. My mechanic is suggesting we replace the BCU.