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Thanks Jaap, The problem then is, is does not run this cycle. (How to check???) I can just measure a steady decline in Volts. For the moment I think I have fixed it by setting the timer for the airco (only window blowing) on a daily base. It looks like this will pump up the 12 V system again...

Well, just got the car back again after some problem with the software, I kept on have the motor management light on. This happened after the 12V battery was flat again after 3 days. (Only 10V left, not enough to get things going) So, the problem of a drained 12V battery persists and garage...

Well, just got the car back again after some problem with the software, I kept on have the motor management light on. Meanwhile the problem of a drained 12V battery persists and garage also changed a relais of the towbar. Just measured this morning and guess what: still I'm loosing 0,5V over...

Please also see the other discussion on the subject that I posted on the 12V drain problem. That the 12V battery is not charged when plugged in to the charger is new to me. I did not even know that the 12V battery needed re-charging frequently. So how about stopping with a drained 300V battery...

Well; interesting that the big battery is supposed to charge the small battery every 12 hours or so. I do not think it does that in my car. Anyway, just back from a week holiday and no driving in the car and again flat battery (only 8V left). I will check with garage if the option to load the 12...

I guess placing a current meter in series with the battery and pull fuses is what the dealer has done, it is the classic way to find the source of the problem. Of course I'm not sure, I have not been standing next to the engineer. Maybe there's somebody out there that would like to measure...

My 12V battery drains in 3 days. Dealer has replaced the WIFI unit, no change. Second attempt they changed the complete instrument panel (With the speedometer and power display) Still I can measure that the battery is loosing voltage. Within a day I'm down to 11,9 volts. ( if I stop after a long...