What is THAT noise? W203 C200K Coupe.

Discussion in 'Electronics' started by Darzet, Mar 20, 2014.

  1. Darzet

    Darzet New Member

    Messages:
    15
    Joined:
    Jun 29, 2013
    Location:
    Sunny Poole, Dorset
    Car:
    W203 C200K Coupe
    Last night turned on ignition and moved off and could hear what can only describe as a TOCK every second. Almost like your grandfather clock in the hall.
    Sounded like coming from behind the middle of the dash and maybe something to do with the vents - tapping the central vents with your knuckles make a similar noise.
    Eventually went away after about a minute I would guess, and did the same this morning when I started up then went away after a short while. No warning lights on dash, but bleedin annoying and maybe expensive to fix?

    What is it? I'm thinking it's related to the aircon /ventilation system?

    Thanks
     
  2. AndyPCD

    AndyPCD Registered User

    Messages:
    1,068
    Joined:
    Jul 19, 2009
    Location:
    Watford
    Car:
    C250 cdi amg sport plus
    It will be one of the stepper motors for the flaps in the heater box

    Its quite a common problem on the car. Will need plugging into star machine to determine which one its is.

    Some are easier than others to change. Some only need a few dash trims removed to gain access while others require the whole dash being removed.
     

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