Problem with Clutch on a 86 300E

[jpnanda]

Hi I have a 86 300E 5 speed. I am having a problem, when I press the clutch paddle it goes down and does come back up. It happened few days back and later in the afternoon it was ok and it worked fine for nearly 4 months. I did not use the car for while but Yesterday when I went to the car, I ran into same problem. Can anyone advise me what can I do to get it going so that I can drive it to a mechanic and what do u advise I need to get fixed, because when the paddle comes up and works, I have no problem changing gears and it works perfectly. And where can I buy the part if any which I need to replace. Thanks for the help