Just bought 2015 Camry XLE had 57K at purchase. Rides well. Problem, I cannot update Navigation Home, Preset Destination or Address Book etc., pressed buttons are slow to react or not at all, I punch a letter or a number and something entirely is selected. In short, the Navigation setup is not behaving as instructed in Navigation and Multimedia System Owner's Manual and Navigation System Quick Reference Guide. I called Toyota Customer Serviice, they were not of any help. Anyone know how to solve the problem?