Yeah, these are the diesel version, but petrol ones are available as RobC says.
What else do they do... I can't remember what the original ones don't do, but off the top of my head:
Large MPH digital display
Shows navigation info in the MFD, with a bar that shrinks as you approach the junction
Gallons until empty
Compass
Shows the speed the cruise control is set to
+Most stuff the original can do, just looks prettier. :)