Hello,
My 1982 300D A/C is not draining properly. It sometimes does and doesn't , depending on the position of the vacume servos. At least I think that is what is going on. It may also be a blocked drain. It is aggravated when I hit a large bump and jostle around a bit. When the blower is first powered up, very moist air comes out. I have removed the under-dash covers, the glove box and center console to try and locate the source. Luckily, no dead animal. Maybe it is just 22 years of molds, spores and mildews that have formed an unappealing stew.
I did get a long tube and pour some clorox down each dash-vent. Helped for a while, but ruined my radio. Yep, that was stupid. I have been spraying Lysol in the air-intake area by the front passengers feet. It helps a bit, but I still have the excessive water problem.
No mercedes mechanics worth a durn for 100 plus miles in either direction.
Any help would be greatly appreciated. Thanks!