My 1982 300D turbo has gotten real weak in power when cold (OK when hot) and it smokes more than i'm used to when accelerating. When the car is cold I crawl up the 1/2 mile steep hill in front of my home. This has been the case for two years now. Since then (about 15,000 miles ago) I changed the two fuel filters, loaded Diesel Purge in main fuel filter and adjusted the valves. Things didn't get much better. The EGR has long been plugged as recommended. I will change the filters again and readjust the valves but maybe I should do the IP timing as well. Your write up will be my guide, but first does the method you provide instructions for apply to my 616 engine?

BTW even though i have the updated rack idle bolt (installed 40k miles ago) it seems to make little difference to the idle when adjusted.

Thanks

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1972 450SL
1982 300D Turbo