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The second issue I am experiencing is the engine idle keeps fluctuating

(1994 Mercedes-Benz C280)
in Wake Island, HI on March 12, 2013
the idle fluctuates up and down and some times it will be steady but mostly it keeps fluctuating,any advise would be appreciated ,what are the possible causes.
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Popular Answer
of Greg's Orange Auto on March 12, 2013
poss dirty throttle body. have throttle body cleaned and see if that helps to start with
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