Its a shame theres no real way to have a good look inside the premium cars. Theres some kind of photomode method but I think you have to look through the windows.
With the interior modelling at such a high standard its strange they don't show it off.
I'll give this a go when I'm in next.
Oh and greede, I've also got a G25 and I've taped a DS3 to the spokes. This gives me 11 easily reachable buttons and 2 sticks. All completely mappable. I never have to take my hands off the wheel but for pausing.
you can also go to single player arcade mode and look inside the cockpit using your head, moving it left- or rightwards. It's funny because if you hold L1 to see the back of the car, the button assignments don't work, whilst the head moving does!!