If it is like the Polo GTI which is 9N3 there are three bolts that hold the electric switch/triggering mechanism in place. In my car the bolts fell out (into the bottom of the hatch) and therefore the electric switch fell off and could no longer trigger the unlock mechanism. Search on YouTube for a video. In my case it was the easiest of fixes. Simply bolt the switch back into place with the 3 bolts. In my case we put some Locktite on them just in case.