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knocking noises from behind the cup holder

Discussion in 'Bodywork, Tyres, Wheels & Trim' started by pmeatonmobile, Nov 26, 2012.

  1. pmeatonmobile

    pmeatonmobile New Member

    Likes Received:
    Nov 26, 2012
    Your Mercedes:
    I have recently bought a MB CLK 240 W309 petrol 2002 and have knocking noises from behind the cup holder next to the heater controls. I have removed the glovebox and found a control unit which operates a flap which i believe to be causing the knocking. This car has had a new battery fitted and the pollen filter removed. The sensor for the AC beneath the filter has become dislodged and fallen into the heater blower motor blades. Should I replace the control unit or the air temp sensor to stop this annoying knocking?:confused:

    Any MD techs please help...

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