New here as the A4 has surfaced as the frontrunner in my new car search, as my wife has finally convinved me to look at sedans.

I am looking at 2010-2012 model years and would like some assistance in how to visibly recognize base premiums, from PP packages, sport packages, S-line, etc.

Example--do all PP's have xenons and LED drl's? are bolstered seats the main indicator of sports pkg? Is an S-line automatically a sport? Have package inclusions changed between 2010 and 2012 ( had one audi dealership selling a 2012 S-line tell me that in 2012--S-line automatically is sport) I think you guys get the idea

I appreciate the insight as I continue my Audi education.

Thanks to everyone!