My clutch pedal became useless for a little while...

cheshirecat

Have the dealer check for master or slave cylinder failure. Barring that, you've just experienced the dreaded hot weather mushly clutch phenomenon.

If the cylinders are fine, upgrading to a stainless steel clutch line and changing the fluid to some Motul RBF600 will do the trick.

The 350 has the same problem- it gets worse in the summer due to the ambient air temperature. The stock fluid ends up getting hot and eventually comes to a boil, both causing the clutch to lose pressure and ruining the fluid.

Good times.