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R320. CD1 tickover

Discussion in 'Engine, Drivetrain, Fuel and Exhaust' started by MarkF, Jan 13, 2018.

  1. MarkF

    MarkF Senior Member

    Likes Received:
    Dec 24, 2006
    Rhyl, North Wales
    Your Mercedes:
    ML 270CDi
    This stunning car arrived last September. Now ever since I got it the tickover has always been around 800/900 rpm in or out of gear. Just of late it's got a mind of its own, sometimes it will drop to around 600/700rpm, still nice and smooth. Other times it will start at the 800rpm and then after a short drive, stop at a junction and it will suddenly drop to 600/700.
    Just wondering if I have. Sensor on its way out, could a man sensor cause this.

    Any ideas?

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