gidpor:

Make sure you don't have any vacuum leaks before you start messing about with the mixture, since intermittant vacuum leaks cause the mixture to "wander" -- resetting won't work.

My bet is either a sluggish idle control valve or leaking hoses. If the idle control valve is still sticking, it can cause an occasional stall when abruptly coming to a stop. They can be cleaned, but if cleaning doesn't work, it will need to be replaced. Check to see if the large hose on either side is still pliable. If they are hard, they will work loose and leak intermittantly. This, of course, is the cheap fix.

You could also have problems with the changeover from running to idle engine condition, about which I am ignorant!

Peter

__________________
1972 220D ?? miles
1988 300E 200,012
1987 300D Turbo killed 9/25/07, 275,000 miles
1985 Volvo 740 GLE Turobodiesel 218,000
1972 280 SE 4.5 165, 000 - It runs!