1) Yep, everything should work minus things like temperatures, tyre pressures, battery voltage and dates.
(It would be nice for my Gallardo to display the actual PS3's XMB date, but it would be kinda weird during a 24H race when the day changes. Save the date for the day GT has it's own in-game calendar perhaps?)
2) Ahh, whoops. It's the Maserati GTS and the newer Fiat 500. Forgot about the Viper as it's another 'nothing works!' car. Think I can add the 787B to the perfect list too.
Might as well rant a bit since I'm here:
IMHO, many of the premium cars were rushed inside and out. Apart from non-working components, there're more oddities like:
-Strange driving positions (head pointed down) on the XK/XKR and '08 Civic.
-The Gallardo's bright, contrast lacking interior (the odd white-grey should be more black and it's preventing it 'flawless' interior status) and the RS6's super fuzzy blocky dash.
The most annoying part of non-working stuff is when it's a fairly significant or decently modeled car, like the old 500, Beetle, the Murcielagos (the
tiny oil pressure gauges), the R35s, LF-A, ACR and the ZR-1, that suffer from it.
And I've not started on the flawed
exteriors!
On conclusion, I feel it's a real pity that very few others notice things like these. Are reviewers and most players really happy the way things are?
Considering the
sheer number of basic flaws in car modeling in other games as well, it does make me even more depressed. In general, we've gained in polycount but lost in attention to detail, even the GT franchise...
(/rant,

)
Edit: S15's clock broke with 2.10 (used to work, minutes appear to be stuck at race start time). R33 and Vitz seem perfect. S13 has missing clock and odometer while GT 86 and Supra appear to have non-functioning fuel gauges.
To save time, I've been assuming that the fuel needle would point to F at race start if working.