I have recently found that the floor on the Driver's (left) side of my 420SEL is wet, and it seems to be water. The water seems to be coming from the front of the car, and I am presuming from the climate control system. I've been using the a/c a lot (it being 107F today in Tucson), and the car never has any condensation dripping from the bottom of the car after having the a/c on. I'm suspecting that a drain from the a/c is clogged and that is where the water is arising from. That's the best idea I've had. My questions are:
1) Does this sound right?
2) Has anyone had similar problems?
3) How do I fix it?

Appreciate all constructive input.

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Der Panzermann und Fraulein Fahrvergnuegen

1991 420SEL 201K "The Big Blue One"
1985 300DT 205K chassis/285K engine nee California emissions "Goldbug"
1983 300TDT 255K "The Womble"
1983 300 DT 214K "Sea Sprite"-Rear-ended a truck
1983 300SD 285K "The Donor" Gave his life so that others can live
1980 500SL Euro 105K "Der Panzer"