Check out the idle air hoses. They get loose at the ends and start sucking in air.

Had the same problem with my car, thought it was OVP. Started out intermittent and infrequent, but slowly got worse and worse. Like you, it would always stall as I was coming to a stop - when the engine is transitioning from a running mixture to idle.

Eventually, the idle got really rough and it was obvious something was very wrong, but that was 6 months from the start of symptoms.

Good luck.

I think like me, you will find a vacuum leak somewhere under your hood if you poke around. Listen carefully under there with the motor running. You might hear hissing.

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-tp


1990 300SE "Corinne"- 145k daily driver - street modified differential - PARTING OUT OR SELLING SOON - PORTLAND OR. AREA - PM ME FOR DETAILS
1988 560SEL "Gunther"- 190K passes anything except a gas station
1997 S420 - 265k just bought it with a rebuilt trans. Lovely condition