Did you ever solve your problem
Seeing as this problem is predominant with this year and model Benz, did you ever solve your problem. What parts did you end up changing out during your troubleshooting, and which one finally fixed your rough idle?
"Tell me and I will listen, Teach me and I will learn, Show me and I will accomplish, Involve me and I will succeed."
'84 300SD 256,000 Gold on Brown (Mileage Award)
'86 300E 246,000 Blue on Tan