Thread: 1989 300E rough idle fixed ?
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  #5  
Old 04-09-2008, 10:01 PM
benzdriver737 benzdriver737 is offline
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Join Date: Oct 2005
Posts: 36
This helped...
The one thing that finally helped improve my idle was to re-gap the spark plugs (non resister) to .040.
The improvement to idle smoothness was outstanding.
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