159 SW tail gate sometimes does not open
I recently bought a 159 SW 3.2 JTS from 2006. It is a superb car.
However, sometimes the tail gate will not open when I press the key on the fob or the key on the ceiling. I checked both fobs, but if the tail gate refuses to open, it will not open. The tail gate generally refuses to open in the morning, when the car is parked for at least the night.
Today I learned that if the tail gate refuses to open, I have to put the key in the ignition, so the car wakes up, and then I can remove the key fob and use the button to open the tail gate.
Is this standard procedure ? Has it something to do with the tail gate going into some kind of sleeping mode ?
AR 159 3.2 JTS (2006), AR Giulietta 1750 QV (2011), AR Alfetta GTV 3.0 V6 (1984)