Now I know you have a 2015 car, the front catches on the bonnets are hard work. Follow Graham's advice above - it may just need more force that you are comfortable with. Once you get it open, you will see where to apply a little grease to the slider mechanism.
The 4/4 of that era is a splendid car. With 1300 miles, yours is not even run-in. Once you get over 10,000 miles they loosen up a bit. Our Feb-14 car is currently on 29k and runs very well indeed.
