Tom,
I'm Certainly no expert but I have had a similar experience on my ’89 260E with 120K. I had to keep my foot on the gas a bit at a stoplight to keep from stalling although the car started right and ran the highways perfectly. Prior to taking it in to the shop I ran a can of Gumout injector cleaner and some gum must have gotten cleaned out because it perfect as a Mercedes should be. Needless to say, no shop time was required and I’m a happy camper..