300D Air Conditioner Drain Hoses

After running the AC, and when there is no rain, the driver's floor gets soaking wet. Sometimes the water seeps back to the passenger seat floor on driver's side. I believe the AC drain hoses must be clogged or cracked, but do not know where they are located to check. Any help? Don't want to go to the mechanic if I don't have to....

The drain hoses are on either side of the case. They were originally a spongy very pliable hose, and can be replaced by some 18 or 24 millimeter hose. The Benz part number is either 900271-018024 or 900271-024---. They may want to sell it by the meter, but you only need 2 pieces about 8 inches each.