finding combination relay
 

i have a 94 E420 an iam trying to find the combination relay for my hazzard lights, turn signal,an intermittent wipers i read on another thread that they were having the same problem could someone help me out:confused:

rear of fuse box
 

their all going to be in the rear of the fuse box ,a-f (You'll have to take the
fuse box cover off)

Here's the service manual:
http://www.pauldrayton.com/uploadfiles/merc/Service/W124/Index/119index.html

Look in section #24 Electrical troubleshooting.

I had the same problem with my 95 SL500. Turned out to be the fuse and fuse holder. I just replaced the fuse which checked good electrically but was in bad shape at the ends where it made contact.
Based on that experience, when my ignition switch seemed to have failed some time later, I found the same problem (different fuse).