My 2016 Tesla model S 75D had a low voltage warning pop up and said vehicle may not start 2 weeks ago and said service required. The nearest service was 400km away so I could not take it in right away. A software update was released, I did the update and the warnings went away. Yesterday the low voltage warning popped up again and and said service required. I parked it in the garage and today the car is completely dead. Doors won’t unlock and I can’t plug in the car charger. Tesla app wants me to bring it in 400 km away to the nearest Tesla service garage. I’m not sure what to do since I can’t even open the car up. Anyone have any idea what is going on? The car has 74,000 km on it. Could this just be a simple fix replacing the 12v battery or am I looking at a major repair? If the car powers up after replacing the battery is it safe to drive the car 400km away to get the serviced? Or will I have to ship the car out? Pics attached were from last night when I parked the car in the garage.