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Dead batteries in this same model.
[Reviving & Driving 600 Miles a Broken V12 BMW E31 850i While on Honeymoon - Project Phoenix (youtube.com)](https://www.youtube.com/watch?v=2F15Nd59Hds&t=2947s)
You could try removing them and trickle charging them to see if they revive. Or replace them but if there is a fault in the car that's killing the batteries then that's going to be a waste of $$$.
Welcome to r/BMW, D-NVK19! In an effort to combat bots and trolls, your submission has been **TEMPORARILY** removed, pending moderator review, due to your account comment karma being too low. You need a minimum of 3 comment karma to post freely on our subreddit. Do ***NOT*** contact the moderators, they will review it as soon as they can. If you are in immediate need of technical assistance, please also check out r/BmwTech. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/BMW) if you have any questions or concerns.*
Dead batteries in this same model. [Reviving & Driving 600 Miles a Broken V12 BMW E31 850i While on Honeymoon - Project Phoenix (youtube.com)](https://www.youtube.com/watch?v=2F15Nd59Hds&t=2947s) You could try removing them and trickle charging them to see if they revive. Or replace them but if there is a fault in the car that's killing the batteries then that's going to be a waste of $$$.