I currently own a 2012 Audi A4 Prestige S-Line fully loaded that I will be trading in when my 328xDrive arrives. A couple of things to keep in mind. If you look at the A4 sales for last year they where down most of the year and there was no Audi advertising for that model. This year the model has been refreshed and I have noticed a significant increase in the Audi advertising I see on TV and online. I'm sure both of those play into the increase in sales. Also, wasn't the MB C-Class refreshed before the new F30's? If so then they have had more time on the market.
'13 328i xDrive | Black Sapphire Metallic| SL | CWP | DAP | TP | PP | LP | HK Audio | SA with Paddles | AT Alarm | Totally Wicked Awesome!