Hello, I bought Honda HRV from USA marketplace because of AWD (there is no option in EU) and I was wondering if someone can help me with conversion values miles / galons / fahrenheit on km/h/ litres/ degrees celsius.

1. At the beginning, I have question about head unit radio. In this USA version I have HondaLink which doesnt work at all, I mean cant connect my phone by port usb. Only bluetooth works and radio, so I want more useful. I was wondering If I can change this radio on original european version and It should be just plug/play? I can buy it on marketplace and just change, can someone tell me if it will work?
2. Same story with air conditioning panel, If I buy and connect european version with degree celsius should it work after connect cables whi are connected already to usa version?
3. Is possible to change in on-board computer values miles / galons on km/h litres? Maybe there is somewhere hidden menu where is possible to change it? Or it should be change by professional mechanic?

Please give me any advices.

Greetings