I wonder... did you ever have the engine hoocked up by a pro to mesure the CO/IC and make him do the right fuelpressure and exhaust gas analysis?
maybe I was mising that, but to my memory I only remember you doing many average "hunts" and trouble shootings.
If I where you I'd like to know once and for sure how its running on a complete an thorough regulation.
I have a BOSCH-pro near by and he allways does the finetuning for me to sum up the tackle.
here's my 84 230ce with k-jet hooked up