I have learned the hard way to not be a beta tester for the car manufacturers. 2007 BMW E93 cost me more to keep going then all my 12 previous BMW’s combined and I did all the work myself except for walnut blasting water pump replacement. Sorry to hear your issues but this problem never goes away. 1974 Chevy Malibu SS which would go dead. I mean dead as in nothing. Imagine 9 pm at night and the car dies on the interstate and you coast to the side of the road no lights brakes except manual etc. I think I would ask for a meeting with the general manager of the dealership. Failing that posting on FB might be a good idea too. Again man best of luck been there twice before. Maxcare for my current JGC and CPO for my 15 Sahara JKU while I love.