Just wondering if there is anything special to look for a leak or hidden drain clogged?  Went out the other day and the drivers and passenger side carpets are SOAKING wet.  I can't see where it may have come in from the t-tops or door weatherstripping.  I have tried to do a search, but nothing I tried comes up.  Thanks in advance.  Tom

It may be coming in from corrosion in the bird cage. Try removing a kick panel and seeing if theres a lot of rust / moisture inside there. C3s are famous for this.

Another place C3's are famous for having leaks is the drains under the hood at the base of the windshield...you'll see them by the screen at the corners of the cowl.  They very often fill up with leaves and debris over time and water leaks inside rather than drain to the ground.

When we were at MAM for the gathering Kenney Yager gave a seminar on leaking C3's His quote was "All C3's leak and if you have one that does'nt, it's because you have not found it yet but all C3's leak"

Thanks guys. I don't have leaking t-tops but the drain at the base of the windshield makes sense since the leaves just fell off all the trees in the last few weeks and since I also drive my car almost everyday I will check for the blockage at the cowl area.  I thought I had read about that somewhere, but doing a search didn't turn up anything.  Thanks again!! 

Check the drain holes in the bottoms of the doors, too. Water can collect inside the doors, and if the drain holes are stopped up, the water will eventually run out to the inside of the car.
Also, the drains for the cowl are at the bottom of the kick panel area. If you take the kick panels off, you might see some wettness. You should be able to see the actual drain holes from underneath that area. I used to have a couple of pics of the cowl drain holes, but I prolly can't find them...but I'll look.