Due to a change in travel plans my 612 sat unplugged in a parking garage for 9 days, 20 hrs. Initialized and started up without hesitation. After a quick 10 minute run around the block the battery was 12.8 V. She was parked after a 250km drive so the battery would have started with a full charge ( caveat- both battery and alternator are a few months old so the charging system is working optimally). An Autel Ap200 was in the OBD port for the entire time as well. I was perhaps more worried than I should have been. Bill
Battery cutoff switch on or off? I dont think mine makes it that long, new battery installed this year too.
Were the doors locked with the key fob? I would assume yes. I have always heard that the immobilizer is responsible for the parasitic current draw on 612/599, which leads to battery drain. I have not tested this myself, but I rarely lock my doors when parked...because I am paranoid about the battery!
Did not realize the 612 bled down the battery so quickly. My 575M can go 3-4 weeks with no problem and has not been on a charger for 15 years except while in for pro service.
The Maserati GranTurismo has the same immobilizer and the same problem of rapid drain. I have never had one (612 or GT) last two weeks while locked. Unlocked you might get a month. Bill
