If you're experiencing issues opening the locking hasp of your trunk, odds are, you'll need to push in the plastic button shown below. 

Push the button down and pull back on the hasp at the same time. 

Trunks come unlocked from the factory. If you have locked your trunk, you may need to insert key, turn counterclockwise, then push in black button and pull back at the same time.

 

Locking hasp - Arrow pointing to location of "open" button