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My MY05 C2 driver window has begun to intermittently fail to "auto up". Here are my observations:

  • No problem with the passenger side auto up or auto down
  • Auto down works fine on both sides
  • Manual up works fine on both sides
  • The problem first appeared a couple days ago... I thought I didn't lift the switch high enough at first. Second attempt activated auto up just fine
  • The problem has worsened over the past few days. This evening multiple attempts were required to get auto up.

The behavior is how I would guess a failing window switch would behave. Is window switch replacement a DIY task? Is there a separate relay to control the auto up vs. auto down function? 

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Mine did the same recently. Just replace the switch unit, easy enough job. No extra relays involved. You can strip the switch down and clean the carbon membrane and it works again! That then gives you a spare!

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