The Porsche has been sold as a Transsyberia version, which went to Mongolia already.Here is a question for you.
Do you prefer field repairable vehicle or reliable vehicle?
If it’s not field repairable it’s not long distance remote travel vehicle.
would you take a used Porsche SUV And try to cross Mongolia ? Or go to South America ?
It is repairable, but what you mean is parts availability.
Because it is not much different from a full options Landcruiser, in terms of technology involved.
The Cayenne just requires (like many German cars hehe) being a bit picky about which version you take. If I would do it, I would take a petrol v6 base version with manual and steel springs. No reason not to take it overland. They can do high mileage.