My Jetta 2005 clutch pedal was left

The pedal stayed down and I do not know what it is, it stays down and no longer entered any change, on that same day it worked again and I moved it some 2 km and everything is fine, but in the course of the journey the same thing happened and now if I no longer raise, which can already be changed the clutch pump but it remains the same, it does not smell of burning or anything, it will be the cylinder that is in the transmission or Clutch?, I expect some response thanks in advance ...

If the pedal does not return and you have a hydraulic clutch, Primro Czechs the pump, then the auxiliary cylinder and if your thrust bearing is hydraulic that can be the problem, ovio eliminating the other two causes before lowering the box, disc is not by very spent that the pedal returns, it is the fault of some of the factors that I mention, loop if with the regulation of the vast. Czech pedal and luck.