I'll post here as well since this great site covers a lot of A5 as well. The site has been updated with even more retrofit instructions and notes for Audis:

http://www.geocities.com/a6retrofit/

- retrofit analog TV
- VAG COM coding
- retrofit digital compass mirror
- retrofit DVD navigation
- retrofit Bluetooth phone control
- retrofit voice control
- retrofit hybrid analog/digital TV
- notes on retrofit rear-LEDs (A5)
- retrofit Audi Parking System
- retrofit rear camera
- exchanging inlays, bumpers etc.
- notes on AMI, Dension, MMI

etc.<ul><li><a href="http://www.geocities.com/a6retrofit/">http://www.geocities.com/a6retrofit/</a</li></ul>

This may be a dumb question but I noticed your seats in the pictures. Are those seats new for the 2009 s-line? I have a 2008 s-line and my seats do not have the s-line monogram on them?