Rearview System Braking problems of the 2015 Tesla Model S

1)mcu1 flash memory failure in production from 2012 to 2018, part is available, but would require downing the car to remove/replace. 2)the symptoms of this failure include the loss of indicated gear state and reduced driver visibility from the loss of rearview camera, defrost/defog and exterior signal lighting which increases the risk of an accident. Driver display is black or booting up slowly during this time and the car can be put into gear and driven prior to the display showing dnr gear state making it a safety risk to anyone walking near the vehicle if it was accidently put into gear. 3)issue was confirmed by Tesla and was told an update to mcu2 hardware at $2250 was needed at the customer (my) expense. The vehicle was under a full Tesla warranty, so I refused and asked them to fix this issue. Tesla service cleared/freed up some memory but said the issue would return unless I paid to update to mcu2 hardware. The issue has returned as they stated. 4)yes, by Tesla service and Tesla engineering. Both confirmed that this was a known issue with the mcu1 hardware in production from 2012 to 2018 and recommended that I (the customer) update the vehicle to mcu2 hardware for $2250. 5)there are no warning lamps or messages to inform the operator of an issue. Only the black driver display, but that doesn’t prevent the operator from putting the vehicle in gear. The symptoms start with slow driver display boot times and progressively get worse over time losing the rearview camera, defrost/defog and exterior lighting controls. The display lag becomes enough to be able to accidently put the car in drive or reverse without displaying indicated gear state on the dash making it a safety risk to anyone walking near the car.