- May 28, 2003
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New car electronics can be a pain in the ass for sure. In my link above, you can see the HVAC controls integrated with headunit, it draws it's power from the headunit lol. It really hampers aftermarket companies like Sosche etc from making DIN kits. When I figured out how to separate the Tribeca's HVAC from the headunit, there wasn't any info about it since no one even attempted it in the aftermarket. No one even bothered to try. The OP's forester is different though and orders of magnitude easier.
If the HVAC is integrated into the head unit, you might look into iDatalink Maestro RR and check if it supports your vehicle. The head unit I bought supports it but I don't need it since the Forester's is not that integrated yet. I do agree that the new cars can be PITA. For my 04 STi though I will probably go DIY if I'm to change the head unit since it's standard double din and there's no steering wheel control.