No Nav system but I hav some apps on my iPad and I actually look at my gauges and trip computer once in a while....
There is a decent app that tells what is at an exit on the interstates, it's quite good ... also have a Shell app that shows Shell stns and also an Exxon/Mobil app that does the same. Couldn't find a Conoco or a Chevron app but those are the four fuels I prefer on trips through the States....
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Member ZSCCA 2009 Z4 s35i with Dinan Stage II software, Sport and Exec packages, 19" 296 rims , a stubby and mud flaps
'03 Z4 3.0i Sterling Grey (Hers)
'01 Z3 3.0i Sapphire Black, M sport package (Mine)