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I have an 08 M3 and it appears I need a new battery (clock losing about 2 minutes/day). I feared it wouldn't be easy to find the right battery without going to the dealership, but looks like I have under estimated the effort involved in changing it out once I have the battery.
I have read the posts, but have no idea about the "coding" that is being discussed.
Can someone please give a short explanation?
Thanks,
Stan
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