On the B7 A4, instead of adding a rear lip spoiler, they put in a whole different trunklid. On the B8, the rocker panels seem to not be an add-on piece either. Don't get me wrong, I like the OEM look but $3000 for the B7 S-line package when I got my 2006 A4 was simply too much. It could have easily been half that much if they went with add-on body parts ratehr than whole new bumpers and trunklid. I also don't care for the interior S-line badges and door sill plates. It's all fluff.
Current car: '07 BMW 335i 6MT, Sport, Premium, USB/iPod, rear sunshades, Crimson red on Lemon/black
Previous car: '06 A4 2.0T 6MT, S-Line, Premium, Technology, Quartz gray/Ebony