Before you skip this post, let me say that I have read most of the threads on water leaks here, and I followed all the advice.

My 300D was taking on major water on both sides, front and back. I used weed trimmer string to clear out all drains. I removed the battery and repaired a hole under the pan. I made sure the drains under the hood were draining freely. I removed the wiper vents and found no holes there. I hosed her down good and found no leaks.

I then replaced all interior padding and carpets (ruined by PO). Last week I took her for a ride on a very rainy Friday. I returned home to find the passenger side was completely saturated! I used a shammy cloth to remove about 5 cups of water.

Today, I rechecked all the drains. All were still clear that I could see. I stuck my finger in the side member drain (between the front and back doors on the underside), and about 2 cups of water poured out. What area of the car does this drain? How do I prevent it from getting clogged?

I then hosed down the car for a good 10 minutes- no leaks anywhere. Did I fix the problem?

Is it possible that the floor drains are dry-rotted and allowing rain water from the road to splash into the cabin? If so, why was only the passenger side wet.

Sorry for so many questions, but as you can imagine, this has been driving me nuts! I put a lot of time and money in the interior, and I don't want it ruined. Or for the floor to rust out.

Thanks,
Avery

1985 300D, 257K