W203 C32 interior lighting problem

Discussion in 'Electronics' started by M5CLK, Nov 9, 2008.

  1. M5CLK

    M5CLK Member

    Messages:
    46
    Joined:
    Apr 30, 2007
    Location:
    Hong Kong
    Car:
    '02 C32; '02 M5; '08 328i (in US)
    Hi guys,

    My '02 C32's interior lighting is acting up.. When the key is at off or out of the ignition, everything works fine. But when as soon as the engine starts or key at pos 1, the COMAND, A/C lights and overhead light cluster all starts to flickers, the COMAND switches from day and night randomly, the A/C illuminator as well as the parktronic indictor goes bright/dim randomly. And the overhead light cluster switches flicker, plus the sunroof or door lights won't work. If I try to turn on the front overhead light, the light will just flickers when I hold the button in... Other than that everything is normal, and I can hear a very faint ticking sound coming from the overhead light cluster.

    Anyone has any idea if it's a light sensor or electronic shortage somewhere? Thanks!!
     
  2. whitenemesis

    whitenemesis MB Club Veteran

    Messages:
    15,822
    Joined:
    May 7, 2007
    Car:
    Lexus RC300h F-Sport 2019
    Could be the light sensor. The COMAND has it's own light sensor (I think as mine changes independantly of the headlights). So it's seeming more like a short or relay failing in the ocp?
     
  3. OP
    OP
    M5CLK

    M5CLK Member

    Messages:
    46
    Joined:
    Apr 30, 2007
    Location:
    Hong Kong
    Car:
    '02 C32; '02 M5; '08 328i (in US)
    Thanks for the quick reply! I think the COMAND shares the light sensor with the interior lightings, since they're all blinking in sync.. But the funny thing is the door window switches and the door windors are all working fine... Will check the relay etc tomorrow I guess, thanks again!
     

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