I asked this question on an old thread "Can not shift, clutch out?", but not sure anyone will answer.

I was driving my manual 6-speed 2004 XF, when suddenly I could no longer shift gears. The clutch pedal was impossible to push down. I could shift it into gears when the car was off, the pedal still did not move though.

After process of elimination, I have logically concluded the clutch pressure plate and disc need to be replaced. I don't believe it is the hydraulic system (ie. master and slave cylinder). Wondering if anyone has experienced this issue, and how they resolved it?

As I have experience changing pressure plates and disc, am I on the right track by changing them on my XF (obviously also changing the pilot bearing, throwout bearing, and seal)? Would hate to change this, when I should've done the hydraulic system, lol, which I strongly do not believe is the cause, otherwise my clutch pedal would be too soft, instead of it being too hard to push.