997 Imports USA

Hello, I would like to import commercial Porsche 997 from the USA. Would have a few questions about the conversions for Germany here. Would I be happy if you could help me. 1. How expensive is the conversion to Km/h. Does the speedometer have to be recalibrated here? The same applies from miles to KM? Does the complete speedometer unit have to be changed? 2. What about the software. Probably an English software that controls everything (radio, navigation). I have heard that some radios in America don’t have intermediate frequencies. What does it look like here at Porsche? 4. Can the Navi also read German Navi CD’s? 5. Do you have to change what is happening on the body and the sham throw? 6. Which workshops do such work? Porsche workshops will probably not carry out any upgrades here. Can free workshops access the electronics at all? many thanks Philipp