Unlocking the tailgate with a key
It is possible to unlock just the tailgate using a button on the key.
Brief press on the 
button on the key.
button on the key.The tailgate is unlocked but remains closed.
The side doors remain locked. The lock indicator on the instrument panel extinguishes in order to show that the entire car is not locked.
If the tailgate is not opened within approximately 2 minutes then it is relocked.
Long press on the button on the key.
button on the key.The tailgate is unlocked and opened, while the side doors remain locked.