So as the title says rough idling during start ups cold or hot, but only hot after car has sat for a bit. Here's what I tested and all tested were carried out following the service manual.
1) fuel pressure, passed
2) cold start valve, passed
3) coolant temp sensor, passed
4) idle air valve, passed
5) all electrical components of ke-jetonic (plugs, wires, cap, rotor, ezl, mas, ecu, o2 sensor, ovp, eha, etc.) All passed
6) compression test of all cylinders, passed
7) vacuum leaks, passed

I just realized that I did not check the fuel injectors for leaks, though the injectors were purchased brand new about a year ago. I'll test them tomorrow. I'm curious as to what anyone else has experienced with a similar problem and what the solution was. I'm also curious about the air/fuel mixture, I tested that as well, but I've never had an oscilloscope or dwell meter g to know what the actual mixture was, however the fsm states to disconnect and plug the fuel evap hose going to the throttle body and increase the rpms to 2500. The% given on the x11 port should not deviate more than ±10. So what I did was set the multimeter to VDC, increase the rpm to 2500 and then took the fluctuating number I saw from that to set the mixture so it was within spec. The voltage range was between 2.5v - 3.8v. I know this is not the correct way to do this, but logically it made sense and even after cranking the mixture to the extreme left and right, when running the rpms up to 2500, I still got the same numbers, so I believe the values are close enough to spec. I also must mention that once the rough idle phase passes, the car runs smooth. Also there are no codes stored.

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1990 190E 3.0L