W140 rough idle

03-16-2001, 08:18 AM

jerry1

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I have a '97 S320 which runs like a turbine EXCEPT at idle. The idle speed is slow (looks like only about 600 rpm on the tach) and lumpy, but if brought up a few hundred rpm (either by the pedal or if the a/c comes on) it smoothes.

Is there an easy-to-locate idle adjustment?

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