E-Class (W211) 2003-2009

Intermittent bad idle in D e270 cdi

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Old 03-06-2011, 12:42 PM
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w211 e270 cdi
Intermittent bad idle in D e270 cdi

hey guys my e 270 cdi sometimes starts to go up and down in revs.
It go's up and down about 50 rpm's, only when standing still on the brakes and in D.

If i switch it to N it inmidietly stops.
Switching back to D starts it again.

You guys have any idee what this could be?
Old 03-07-2011, 01:00 AM
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2005 E320 CDI, 2007 GL 450
Thinking old school on this one my best guess is torque converter.
Old 03-07-2011, 06:54 AM
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well if it is the torque converter why does it do this only every now and then?
Maybe i should try an oil flush.
Old 03-10-2011, 05:35 PM
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No one?

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