Unlocking the tailgate with a key button
There is a button on the key to unlock the tailgate only.
Press the key's 
button.
button.The tailgate is unlocked and can be opened from the outside.
The side doors are still locked and the alarm is armed*. The lock and alarm indicator on the instrument panel extinguishes in order to show that the entire car is not locked.
If the tailgate is not opened within 2 minutes then it is relocked and the alarm is re-armed.
Power operated tailgate*
Hold the key's button depressed for a couple of seconds.
button depressed for a couple of seconds.The tailgate is unlocked and opened, while the side doors remain locked and their alarm functions armed*.
Note
If the system for the power operated tailgate* works continuously for a long time, it is deactivated in order not to overload it. It can be used again after a few minutes.