Today I noticed a puddle just behind and under the right front bumper
of my 380sl. At first I thought it was just rain water, but it felt
oily, and it appears to be coming from a rubber donut-like grommet on
the  bottom of the metal plate the horn attaches to. There's another
grommet exactly like this one on the other side, but its not leaking.

All my fluid levels seem to be fine, and i don't see any hoses going
into or coming out of the area. Anybody have any ideas about where
this fluid's may be coming from.

Thanks