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stephenmcc

05-22-2011 11:46 PM

E550 over revs at idle

2011 E550 has suddenly started to over rev at idle, normal idle is around 500 rpm and revs go up to about 800 rpm, notice it most during warmer weather. Has anyone experienced this?

vraa	05-22-2011 11:48 PM

Is your AC on both times?

stephenmcc

05-22-2011 11:50 PM

yes, I turn it off and the idle falls to 500, I turn it back on and the idle stays at 500. If I blip the throttle the revs go back up 800

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