CD Player Swap to Sat Nav

[Slove40]

Hi

Looking for some advice, I have 2007 Honda accord estate cdti. 

It has the standard cd player, it also has telephone controls on steering wheel, no button at back. 

 

Can I swap over to a sat nav honda system OK with same connections? 

Do I have to add a GPS adapter? 

Do I have to add the Bluetooth module to use steering wheel, where would the Bluetooth module be so I could check? 

 

Thanks in advance