4 and 5 only: Toyota Prius Hybrid - 2012 Models: Prius Two, Prius Three, Prius Four, Prius Five Look at Auto-dimming rearview mirror You can get it by buying and adding your own auto dimming mirror that has the homelink controls in it, some people have done it on here
For 2010, and I guess probably for 2012 also, you can get the Toyota Homelink mirror as a dealer-installed option (except with the solar roof, maybe because that model has a different dome light), or possibly install it yourself (this requires removing quite a few trim pieces to install the wiring, because it needs to be wired to connections down in the dash). Or, I think there are other brands of Homelink mirrors that may work also. Here's the instructions for installing Toyota's mirror: http://www.toyotapart.com/PT374-47100.pdf This has also been discussed many times here, here are some previous threads: http://priuschat.com/forums/gen-iii...57-auto-dimming-homelink-rearview-mirror.html http://priuschat.com/forums/gen-iii...omelink-rearview-mirror-install-question.html http://priuschat.com/forums/gen-iii...n-shop-longer-than-its-been-in-my-garage.html http://priuschat.com/forums/gen-iii...ions/92144-autodimming-mirror-w-homelink.html http://priuschat.com/forums/gen-iii...cations/77775-homelink-upgrade-prius-iii.html http://priuschat.com/forums/gen-iii...-mirror-replaced-w-auto-dimming-homelink.html
Yep, there are also other options besides just a dealer installed one. Others have used em' on here and I think the OP can search and find threads mentioning names, price etc.