Quote:
Originally Posted by Ottawarealtor
This problem is not unique to M3's,I had it also on my E60.finally solved it by turning car off and then pressing the stop key a 2nd time,which immediately turns everything off,instead of the one push which takes about 7 minutes for the car to go to sleep.This solution worked for me after going through 2 batteries with your problem.
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I always push the start button twice when turning off my car, battery still died in 3 years.