Want to Replace Factory CD Player

[Pipsky]

I want to know if the fiat Radio units have an auxilary socket on the back or if i will have to buy an aftermarket CD?

If there isnt would their be a way to add a headphone jack to the original CD player?

If i did buy an after market CD player would i loose any of my trip computer info that comes up on the display between the dials? or would it just not put up when you change track and instead default to the time and date.

The car is a Stilo 1.6 Dynamic.

Thanks
Pipsky