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I've been experiencing the same issue with my car.
My M settings do not save. After I crank the car it defaults to what I think are factory settings. I tried unhooking the battery for 15 mins, flashing to stock tune. Nothing. I even reached out to the tuning company and we did a reflash of the entire car. I changed key fobs and also updated my I drive to the latest version.
Along with the M settings not saving, my oil service comes up and doesn't go away. I did everything stated above and reset it on the dash but it keeps coming up. I needed an oil change before the tune which I got a few days later at the BMW dealership where they reset it and it came back. They did me a favor by not flagging my car to void the warranty s/o to them.
Does anyone know what could be causing this and how to fix it?
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