When, I look at the switches that appoint the driver's console, that's what I see...the exposed tip of a mammoth software iceberg, one that represents 3 decades of steady innovation. A giant black box designed to be impenetrable, except by trading up to a newer model year.
That said, the info on this site
https://www.boostmoose.com/blog/2019...e-to-find-them
claims a process for adding "auto dimming" feature to a MY2012 Volvo -- after swapping in part 30739428 light switch to a MY2012 Volvo. It involves "cracking" (modifying) the CEM software with one not factory tested with your exact model-year. That's a risk you have to evaluate. For more details about your '09, check out "VolvoSweden"'s video on VDASH --
https://www.youtube.com/watch?v=p47tuB9B--c
I am not endorsing these DIY CEM mods using VDASH. I'm just passing along something I became aware of after reading your post.
Last edited by pbierre; 03-02-2020 at 09:12 PM.
2013 XC70 T6 Flamenco Red (hers)
2015 XC70 T6 Seashell Metallic (his)
past: 13 Volvos going back to '74 242 sedan
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