Tracked AFVs have limits on their FOV when tracking known targets.
Wheeled AFVs (Marshall, Marid, Gorgon, Hunter) do not. They will see enemies even they approach at a 90 degree angle to crew periscopes and optics.
Expected: Wheeled vehicles should have the same FOV restrictions as tracked vehicles. Crew in MRAPs with open windows should have the same FOV as players sitting in that vehicle.