Hello, I’m addressing you because of a problem I’ve been with for years and I don’t have a solution. I have a SL-R230 350. Maybe someone from you had experiences with something similar or has a good tip? My support battery only lasts about 1 week and has to be charged every 3 days. You can imagine how annoying that is. Description: At first the battery was broken, probably because of deep discharge. I then have a Every time the battery is charged, everything goes again. What I have already done to limit the problem: Purchased a new battery (Varta Silver E 38 74Ah 680A), now the third one. The problem has remained. Battery test of the car workshop: After one day the battery had 12.07 V, the battery condition was 96% and the charge condition was 35%. Autoelectric workshop: Cause of the fault current below the battery I was told that such a search often leads to no result. Even the Mercedes car dealership would only exchange the ECUs, which would be cost-intensive accordingly. The alternator was tested and charged properly. Battery specialist: Auto 1 week left there. No result, Mercedes car dealership has only the appropriate testing technology. Battery has in the developed condition only a daily loss of 0 — 0.1 V. So it is not due to the battery. In my limited knowledge I would think that the rest current consumption of 105 mAH is very low and therefore cannot be the cause. The biggest consumers are listed afterwards. But everything is only small stuff from consumption. Do you have an idea what I can do or what it can be?