after running my car around with no plastic covers underneath, today I saw coolant dripping from below. I jacked up the car & climbed underneath it. I saw coolant dripping off the AC lines as well as off the transmission pan. With a light I carefully looked to see if I could spot where the coolant was coming from. It appears to be dripping down the drivers side of the transmission just in front of the transmission pan. I cannot see any hoses leaking, nor any drips above the transmission. Any ideas on where this leak might be?

I am curious what would happen if the heater core leaked, would it drip inside the car, or outside?

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1987 560SL - 95K
1996 E300D - 183K
1997 E300D - 162K
1982 240D - 160K