Normal idle speed for ML 320 cdi

Smart320

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Have bought a 2007 ML 320 cdi and when test driving it thought the revs at idle looked a bit high at about 850/900 . Can anyone tell me what it should be once warmed up
 

Mr Filipov

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My previous CLS, also a 320 diesel used to idle at ~600, very much the same as my 350 diesel now. On warm weather don't even have high idle.
 

kid-jensen

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Mine is about 1100 when the outside air temperature is low.

Once warmed up, drops to about 6-700.

Obviously, I'd like it to be as low as possibel, but the days when you could change it yourself are long gone...
 
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Smart320

Smart320

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I will follow this up with the garage, they are doing a couple of things before we collect next Saturday , will suggest they check the throttle pedal if still idling at 900. Will tell them I will expect it to have been sorted before collection. Actually the owners seem to be ' petrol heads' and deal in nice high end cars so not expecting a problem. We will see how we go!
 

paul73mt

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I don't have a ML but mine idles normally at 600rpm sometimes it does idle at round 800/900 rpm but this is when its in the middle of a DPF regen
 
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Smart320

Smart320

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Thanks, the one I am buying has no DPF so 900 rpm idle is obviously too high. Have contacted the garage and said I will not take delivery if still has high idle. They immediately agreed to sorting it out , will see on Saturday when we go to swap the car for my E320 cdi which idles at 700 rpm!
 
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Smart320

Smart320

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Original fix did not sort it out for more than a couple of days. Now agreed to supply a new pedal, to avoid having to drive a 160 mile round trip have said I will replace it , here's hoping it's an easy switch
 

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