Idle too slow

Qwandy

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2002 E220 CDi is idling very slowly all of a sudden, idles at about 650 and makes the car judder at a standstill, had a new battery recently, don't know if it is related or coincidence... any ideas or can I just up the idle speed easily?
 

BlackC55

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Your Mercedes
C43
Idle cannot be adjusted. You have another issue.

It is probably a faulty injector or two. Needs diagnosing first.
 
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Qwandy

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perfectly... like a dream
 
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Qwandy

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Jib, Black C55 says he thinks it may be a faulty injector, do you have another theory? It drives fine apart from when idling?
 

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