Just as Larry says. The dribble starts at the snout of the water pump behind the pulley, continues along the bottom surface of the pump then towards the block, hits the block below the water pump, travels rear above the oil pan mating surface, then to the ground below the engine mount. You won't see a trace of the leak anywhere upstream of the water pump to block mating surface so it's tempting to think it's a bad o-ring.

Remove the serpentine belt and tug on the pulley. If there's any axial or radial play whatsoever, it's time for a new water pump.

If your fingers are small enough, see if you can feel wetness along the lower part of the snout of the water pump behind the pulley.

Sixto
95 S420
87 300SDL