Fabio, cold here also where I live, about -1 to high of 10 at best. Still, I drive my cars taking turns because they need the exercise.
Interesting that your 550 drained battery faster than your 575 now ? Wonder why the difference.
Enjoy in good health.
PS. Sorry to hear the terrible news of earthquakes there again.
we are lucky because where I live don't snowing a lot we have not felt the earthquake, but in the middle Italy where is the earthquake center last two week snowd a lot and two days ago the earthquake did other damages, they are very unlucky....
You make good to drive cars taking turns because a regular driving is the better mode to conserve them for the future.
Normally i drive my 575 max every 3 weeks and for sure if tomorrow will be the sun of today (6 °C) I will make a driving ....
Tomorrow afternoon I have apointment with my Ferrari dealer for a test drive with a ghibli, Maserati give taking turns to the single dealer 1 Levante and 1 Ghibli for test drive, I like the SQ4 but for sure both cars will be diesel....
I and my brother (my electronic specialist) checked few times my old 550 and problem was the central locks system that had an absorbtion of 180 mA instead of the 40 mA indicated on the workshop manual, but we never found the real part that create a problem, my dealer can't be able to go inside with SD tester, probalby was a problem on wiring system.
Solution: every time that i parked car on garage I disconnected the battery, easy and simple.
With the 575 disconnect the battery every time is not good becasue every time that you reconnect ad the first engine start ECU need to recalibrate the throttle parameters .... thing that 550 not have.
Now i'm lucky my 575 have not this problem, but the airg bag lampturn on regulary, my dealer check few times but he don't know what is ..