Anyone got any ideas how to open the tailgate on a early 2006 x3. Was struggling to get lock to release, stripped out and cleaned the microswitches in the handle and it worked much better, rebuilt it and occasionally lock wouldn't do anything even though you could hear the microswitches operating, so using a screwdriver i operated the lock on the tailgate floor to make it think the tailgate was shut. Now I cant get it to release meaning that now my tailgate hits the lock now but wont stay shut!!!!! Should I be stripping the locking mechanism on the floor or is it something simpler?