Hello all, I just bought my '94 C220 three days ago (my first Mercedes), but I was disappointed when my turn signals stopped working. I checked the wiper/horn/etc. and it all still works (except the hazards). I'd say 3/4 of the time they don't work, so it goes in and out. Is it a relay in the black box behind the fuses? Which one? Where do I get another one if that's the problem? Thanks so much for your help.

Here's a quick picture for those interested: