Can you put on the sat nav?
'Navigatore' — 'na-vi-ga-TO-re'. Five syllables; stress on the fourth.
Ask when you sense the driver is unsure of the route or when you want the visual comfort of seeing the journey on screen.
'Mettere' in informal usage can mean 'to put on/turn on'. 'Il navigatore' or 'il GPS' is the satellite navigation system. This is a completely acceptable request that many drivers anticipate.
Il GPS funziona?
Is the GPS working?
Checks if the nav system is operational.
Posso connettere il mio telefono?
Can I connect my phone?
Offers to use your own navigation app.
Sa il percorso a memoria?
Do you know the route by heart?
Checks whether sat nav is needed at all.
Italian taxi drivers are legally required to know their city's main streets and landmarks. However, for peripheral addresses or other cities, a sat nav is standard. Most drivers welcome the input without feeling offended.