Hi! been looking around for a few days now, and it is difficult to find help installing a new nav system. My big question is, how do I know if the system I buy, will fit in the car? It says it is supposed to fit all models from 2003-2011. I have been looking at this one: Audi A3 S3 RS3 GPS Navigation 7" inch 2Din Car CD DVD Player Radio Audio Stereo | eBay This is the system installed now: http://ipocars.com/imgs/a/a/n/w/a/audi__a3_sportback_1_9_tdi_proline_navigation_2008_8_lgw.jpg Any answer, help is mostly appreciated! Thank you in advance!