Saw, that, but it isn't quite the same. That will reroute you under certain circumstances that the nav sees. But, won't allow for you to find another route should you stumble across something the nav system isn't aware of (recent accident, heavy traffic, etc.). The system in my Infiniti would recalculate another route under any circumstances (even if you just wanted to for the heck of itCar has a detour option just not called detour. Go into the nav settings and tick all options and the car will take you around accidents etc.