Afternoon all, I have a slight problem with my 1995 n reg disco 1, wen I operate the door handle t open the vehicle from the outside the door pin inside drops slightly and the door will not open, I have t put the key in the lock and turn it all the way to the unlock position and keep it there and open it, I've heard this is a common fault, is this true and whats the best fix .... Any info is much appreciated cheers