On my 05, the clock appears on the radio control unit, not the main instrument cluster. Is it the same in your case? a couple of pixels were dead in my case (not the clock side, but the radio channel side), and the dealer took care of it under warranty.

My service adviser told me that if the main instrument cluster goes after the warranty, they will take care of it under good will... but dead pixels on the radio control unit, no.

I personally wouldn't spend too much money trying to fix this, if I were you. If you can do something as a DIY, and you have the time, go for it. Otherwise, what is a pixel or two?