Strange whirring noise from W208 Rear

Discussion in 'Engine' started by Ian D, Apr 6, 2014.

  1. Ian D

    Ian D New Member

    Jul 28, 2010
    CLK 200 Avantgarde
    All, I have a 2000 year (W reg) CLK200 (non-supercharged). I'm probably going to replace it soon as the rust is just getting too much...

    However, it has started making a strange whirring sound from the rear whenever I hit 1700 rpm when accelerating. It's difficult to describe. As soon as I get passed 1700rpm it goes, and it's not there below 1700. If I hold it at 1700rpm the sound is continuous.

    It seems to be coming from the left rear, but could be central

    I thought originally it was a wheel bearing, but that doesn't fit with the rpm link which I guess suggests drivetrain ?

    Any ideas out there ?
    Any help much appreciated...
    IAN D

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