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My e92 m3 09 had the increased discharge warning, I did a current test on battery and the meter showed about 1 amp discharge. My car was not completely turning off?? Found to be I installed a lead acid battery which is wrong , dealer installed a gel battery. They also wiped my ecu(which I wasn't happy with because I lost my ess tune😡(so I have to reload it). They loaded up 2015 software into ecu. Now the battery problem is fixed. The car draws 9 amps for half an hour then drops down to about 1 amp for about half an hour then down to .08 amp.
Yep these cars take a while to stop battery draw. If you unlock car then close it again the timer starts over.
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