My S85 is about 10 months old. No major problems (other than replacing a charge port door shortly after I took delivery last March). Strange things just started happening: 1) Stopped at parking pay station window, put into park to pay and when I tied to put it into drive the screen said "key not present" (or something like that). After 2 frustrating minutes, it decided to allow me to go from Park to Drive. Thought maybe the battery in the key was bad, but I had just replaced batteries in both keys a month before, proactively. 2) Had a BlackVue Dash cam installed a couple of days ago. Utilized the 12v inside the microphone compartment to power it. They had the car a few days and charged it to my normal 80%. Camera works well (both front and back). They claimed that they did nothing to the electrical system of the car other than tap that unused 12v source in the microphone compartment. The front camera is right under the rear view mirror just as many have placed it. The coax to the rear camera was run to the back window. BUT, I noticed several other things too: 3) The GPS in the car is stationary on the Google map on the large screen, but in the wrong place. Shows the car at a location 10 miles or more away from me, and nowhere near the shop that did the work. Thought maybe it was a temporary glitch. Re-booted both screens.... to no effect. Thought if I drive for a while it might just re-orient itself. It has not moved after 3 days. Because of this I cannot use the GPS as it always thinks the starting point is as displayed on the map, but, of course, I am not there. 4) The Tesla app on my phone also shows that same incorrect location. Confirmed this also with Visible Tesla. 5) Noticed that when I try to plug in the HPWC at home, the charge port door doesn't open unless I hold the charger cable near the rear window antenna. For the past few months it has always opened quickly and without having to do that. 6) Noticed that when I approach the car the handles don't immediately present as they had done in the recent past. They present, but just not as quickly. I have not had a chance to call the local service center yet. Just wondering if all this might be symptoms of impending 12volt battery failure?