Hi all together, I’ve been looking for years now make the mistake/defect that leads to my Z4 from 2006 after irregular intervals but at the latest after about 1-2 weeks of standstill the battery disappears into the eternal hunting grounds. Have already worn out 3 batteries, no error codes are displayed, all fuses also lead to no culprit… Once I parked the car and a few minutes later obviously started running the fuel pump. G Ing until I opened up the car again via FB. Once I also measured an increased resting current of >1A. Unfortunately everything was not reproducible. I did not want to BMW and two freemen did not find anything. Now my last hope is perhaps to change the ECUs gradually. Can you just replace it or have to be learned something after that, coded etc.? Thank you! Greeting Bronkmaster