The whole idea of the Dietz 1280 is to filter the speed pulse from the canbus to fool your Nav system into thinking the car is not moving, hence you get TV whilst moving, but the nav system suffers.
Same principle on cutting the GALA/speed wire on the A6 nav's.
So no your nav system is not fully functional whilst watching TV in motion.
Same principle on cutting the GALA/speed wire on the A6 nav's.
So no your nav system is not fully functional whilst watching TV in motion.