The large touchscreen on my 2014 Model S went blank 5 days ago on a trip out of town. I was seeing increasing glitching over the last while, but did not know about the MCU failure, so had no idea what to do. I am now 325 miles from home, with no Tesla service center within a few hundred miles. The car can run after a boot up period of about 90 sec, but of course: no back up camera, no turn signal, no temperature control, no music, ... On top of that, I got a warning 2 days ago that there was a 12 V battery fault, and that it should be replaced soon. I am still on a road trip, and will be driving 320 miles from California to Nevada in a few days, going through a 100-mile stretch with no cell service. I am feeling anxious that my car may stall on a deserted road.
Does anyone know if the 12 V battery issue could be that it is not charging because of the MCU failure? I have an appointment at the service center at the earliest appointment they had, which is 10 days away (works with my current road trip). What are the odds that I can safely drive another 10 days with a failed MCU and a 12 V battery warning? All replies will be highly appreciated.