The divided screen is called MFA (Multifunktions Anzeige = Multifunction Display) in Europe.
The big screen is the MFA+ and has to be ordered here as an option. Costs 50 Euros in Germany. Late modells in 2005 have the MFA+ included if you order the multifunction steering wheel.
The reason for the different buttons on the wheel is also the modell year. If you have an 2006 modell, manufactured since KW 22 of 2005, you got new buttons and the option to operate the onboard computer with the buttons on the right side.
Greets Eric