hey there i have copied and pasted this from a website, its for a 2006 seat but will be the same......
You can use another option whether the lock of your car is an automatic:
Two solid plastic wedges
A heavy gauge wire or coat hanger
A rubber tip of the wire or a rubber band
Using these materials and follow these steps in opening your 2006 Seat Leon Cupra:
Slide wedge into the gap on your car’s door.
Pry the car’s door slightly in order to budge simply the additional wedge in. So this way will create a gap between your body and the door.
If you open the door, straighten the coat hanger, and then slip it in. That you can get the “unlock button”. It is often placed underneath the car’s window.
You need to press the lock button and the automobile door can be unlocked when you place the coat hanger.
hope this helps and good luck.......