I assume you mean that you can't get the rear flange disconnected from the prop shaft. I'm not sure how the MkV is built, but the following explains how I performed this procedure on my MKI. After separating the rear flange (on the shaft) from the front flange (on the transmission)and removing any set screws securing the flange to the shaft, place a socket which is slightly smaller than the shaft diameter against the end of the shaft and using long bolts draw the 2 flanges together again. This will essentially press the shaft out of the flange. You may need to repeat the process with more/longer sockets and longer bolts until the flange falls off the shaft. Hope this helps.
Chriswheat Second Wind
Chesapeake Bay MD