I couldn't find any relevant information about a restaurant called "Sixt Rent A Car".
However, I found that Sixt is actually a car rental company with locations around the world. They offer a wide range of vehicles for rent, from economy cars to luxury sedans and SUVs.
It's worth noting that there seems to be a location at 1805 E Sky Harbor Cir S in Phoenix, AZ, but it appears to be a car rental office rather than a restaurant.
