Do you think Napa might be able to check for glycol if I bring a sample.....I wonder if there are any kit's available for sale.

FYI....it was raining hard last night. 5 inches in an hour and a half. Thats why I think it's a very strange coincidence that this incident coincides with that when the radiator was wroking perfectly fine and there was never an issue before and I didn't even drive it hard last night. I also checked this morning and there was no tranny fluid in the expansion tank. But, I have to evaluate all options. The whole issue of the rainwater came to mind after I read a thread suggesting that one should be careful when degreasing an engine and not spraying the hose over the back of the engine down the firewall (which is exactly where the heavy rainfall was flowing down through).

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1983 300SD White with Grey interior