Audio, Navigation System & Related • Sync 3.4 upgrade

I'm strongly considering upgrading my Sync to 3.4 using the Cyanlabs method. I am a but hesistant though because on my limited the heated and cooled seats, and rear HVAC controls Only have virtual buttons. If those disappear in the upgrade i will be very sad. Who has done this? what have issues have you had? anyone done a limited with heated / cooled seats and heated wheel. I know there was a thread on it somewhere but i can seem to find it.

Thanks!
Dr.

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