I have a 2012 XV SE diesel and the tailgate has stopped opening. Thus far I have replaced the latch, replaced the switch in the tailgate, had the wiring checked (£85) only to be told it's not working! Central locking on all doors works fine from key and door lock on drivers door but the tailgate is dead. Apparently all the wiring form car through to tailgate is fine . Any ideas where to look next please?