Hi there, I am still fumbling my way around this forum. I have a 5.7US in the UK (they're bloody good aren't they compared to the diesel, provided you look away when you fill up). If you find out how to change to deg C, let me know. I tried with the Toyota software in obd port and still couldn't figure it out. Also, I assume your Nav is a pointless box, I'm wondering if I can get a UK one to work, apparently it won't play non US Nav discs.