My battery has been changed 2 years ago, still under warranty, car starts perfectly, OBD values are "voltage 14,59V" "voltage measured by IBS 14,83V"First step almost always on E89s with mysterious electrical problems is get a new appropriate battery ..then see what happens..
Does not seem a battery problem to me...
Could it be because battery is stronger (80Ah) than the 70Ah standard ?

