Two days ago, I also observed some coolant on the floor which had dripped down onto the oil pan plug. Similar to this thread's picture. I topped up the water reservoir with three std glasses of water.

I dried up the oil pan area and ran the car about 15 miles on an errand (monitoring for trouble and checking under car after parking.).

Back home I popped hood and got under car with flashlight. All is dry. No repeat drip. Engine temp normal. Dry at all areas of coolant system.

Question, I do suspect that the water pump will or is on the out. (132K miles)

BUT, can the water pump weep as a purge ??? i.e. designed to do this under some circumstances????

I want to continue monitoring before acting on a replacement pump and all the other replacement parts that ought to go in suit.

Thanks

__________________
1979 300D 220 K miles
1995 C280 109 K miles
1992 Cadillac Eldorado Touring Coupe 57K miles SOLD
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1979 240D 140Kmiles (bought for parents) *SOLD.
SAN FRANCISCO/(*San Diego)
1989 300SE 148 K miles *SOLD