@rob61
Your South-African purchased 3590 should display Junction Views,Speed Limits, 3d buildings & 3D Terrain out of the box.
You must only have City Navigator Maps selected.
If you have Garmap or T4A selected you will lose Junction Views and Speed Limits.
If your unit is not displaying Junction Views with City Navigator Map you need to contact GSA.
To Test Simulate a route from OR Tambo International to Durban and you should see at least 5 or 6 Junction Views including one BirdsEyeView JV.
Make sure you have all other Maps except City Navigator De-selected and do a full power down of the unit.