[Tobias]

Ugh, yes. Do you have a long flat screwdriver with a narrow blade? First, push in the adjuster tab on the headrest and lift it just slightly past the last lock point. While holding it there, insert the blade of the screw driver into the slot on the base of the other post and push to release the lock. Pull up and both posts should come out. This system is the same across most VWs.

 

[Tobias]

Sorry, I have a complete factory manual for my two VWs. Neither covers tearing down that part of the seat.