A3 Sat Nav Advice Please!

Hi everyone, newbie joining the forum here - hope that someone can help me with this one.



I have just bought an Audi A3 (2011) TDI and it has the Audi Radio as standard fitted. The car also has Audi Bluetooth fitted as an option when I bought it.



I would like to be able to swap the current CD/Radio (Audi Concert) for an Audi Sat Nav Unit.



I have seen them on Ebay, and reasonable money I think. Can I ask the forum bods on here the following:



1. Is it a straight forward fit that I can do at home



2. Is the Audi Bluetooth a separate module that will still work once the Sat Nav is fitted to the car, as I don't want to loose this feature.



Thanks in advance to anyone who can help me - or if there is someone who specialists in this type of install also.



Look forward to hearing your thoughts and advice.



Cheers



Kal