I can appreciate this is an oldish thread, but having recently purchased a T6 and i have have a little input that may help. I also own a ‘09 caddy this had the same issue so when this presented itself during the purchase of my latest aquiestion i used it to my advantage. Previous fix on my Caddy required a slight adjustment on the rod from the handle to the locking modual. I can now get 99% positive results with a little jiggle of the handle when it isnt playing ball. I can only assume that some units wear quicker than others or it may just be adjustment. Either way its an inherent fault with the the parts that im sure VW wont admit to. Hope this helps.The issue I have with the barn doors not unlocking is cured by pushing the handle forwards before you pull it back to open. I've tried to Lub various points but its not working as it should. Its under warranty so will have to chase it up.