Unlocking the boot lid with a key button
There is a button on the key to unlock the boot lid only.
Press the key's 
button.
button.The boot lid is unlocked but remains closed.
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 boot lid is not opened within 2 minutes then it is relocked and the alarm is re-armed.