I had the exact symptoms, but with a '99 E300D, I replaced the fuel hoses & IP seals and washers. (200K) I am sure it was combination of fuel leaks & air infiltration.

The improvement was remarkable. ALL problems at idle, and deacceleration (dying at red lites) were eleminated, and performance improved.

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Gary
Experience is something you get, Just after you needed it....
'99 E300 295K, '83 300D 220K, '75 240D 185K sold
'80 MCI Bus Conv DD 6V92TA, w/4 cyl. Kubota diesel GenSet 12.5KW