It's a well-known problem in the 107. There are two drain tubes, one on either side, that exit near the forward end of the transmission tunnel; the usual remedy is compressed air. If you're going to try a wire from below, be *very* careful--it's not hard to convert a clogged drain into a punctured evaporator!
Occasionally, the problem is not just a clogged drain but a cracked condensate pan; replacement involves taking out the console.
A search will find you multiple threads on this.

__________________
Craig Bethune

'97 SL500, 40th anniversary edition

'04 Olds Bravada (SWMBO's)
'06 Lexus ES330
'89 560SL (sold)


SL--Anything else is just a Mercedes.
(Kudos to whoever said it first)