I have used my 7in tablet running Google Maps with a $30 Bluetooth earpiece and a "charger city hippo mount" from Amazon and even in a heavy rain it has not gotten wet sitting on the transmission tunnel.
EDIT: I have the original shifter lever position and I am not sure that the hippo mount would fit with the current shifter location.
You can set up your map ahead of time on Google Maps website from your computer and send it to a registered device. Pick up the tablet, click the notification and away you go.
Last edited by Mi3Wheeler; 13/12/15 04:58 PM.