My '93 400E was idling very erratic. My mechanic told me it was my throttle body actuator. Stevebfl agreed that it sounded like my problem. I bought it from Partshop for about $1200. It fixed my problem.

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Frank
84 500SEL EURO 101K ( JUST LIKE MY 1ST WIFE. GLAD TO GET RID OF HER! )
85 300D 310K (sold)
90 350SDL 184K sold
83 300D 118K (sold)
88 300E 153k (sold)
93 400E 105K (sold)