i have been working with my local service center to fix an issue where computers in the car are staying in when they shouldn't be. We have gotten the car down to under ten miles per night loss. How much loss are you currently seeing on v8.0. I have a P85. I read a post from 2014 where someone pulled the fuse for the 12v cabin rail. What all is on that circuit? It seems to have made a difference in nightly losses.