Can't engage gears
I have a very occasional (like every six months) fault on our 2.0 16V.
It was impossible to engage any gear, although the clutch pedal felt quite normal under foot. On one occasion the car was sat on the drive, on another the was some 3 miles up the road before the problem occurred.
Eventually you can 'ram' it into gear with a thump, and the problem eases with gear changes becoming smoother with every change until the car returns to normal again.
The car has done 115k miles and is used regularly.
Any ideas?, I would have put money on the clutch slave cylinder, but the clutch pedal feels fine, and why does the problem fix itself for months?