Check all the vacuum line. there are a lot in the vicinity of the throttle linkage and one may have been jolted loose. If the lines are old, removing them may have also introduced cracks, causing a leak. This will require some diagnositic work with a vacuum pump to test for leak.

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Der Panzermann und Fraulein Fahrvergnuegen

1991 420SEL 201K "The Big Blue One"
1985 300DT 205K chassis/285K engine nee California emissions "Goldbug"
1983 300TDT 255K "The Womble"
1983 300 DT 214K "Sea Sprite"-Rear-ended a truck
1983 300SD 285K "The Donor" Gave his life so that others can live
1980 500SL Euro 105K "Der Panzer"