I'm with engatwork the right hand side (passenger side) of the tran fluid pan looks wet. I would take a closer look at that area and see if you can't figure out where it's coming from, sometimes fluid starts leaking from one place and sort of spreads like when you solder; which makes this difficult. You could have a leak coming through the gasket, that's my bet. not a huge deal. Might be a real good idea to check level of tranny fluid before making the next trip, in my 190 there's a dip stick towards the back right top hand side of the engine. If the fluid's not too low perhaps you could run it while it's up on the stands and isolate the leak.
1985 190e 2.3