Looking at buying a wagon and could use some input, especially from those that have owned either. Looking at 2008 to 2012 audi a4/s4 avant wagon or 2008 to 2012 bmw 335i 'm sport touring'. I have test driven both and love each equally, however a short test drive is not enough really. Both range in price from 12k to 20k. Stereo differences? Tech options ie cruise control, multimedia? Ease of use? Reliability, expense of maintenance, repair? What are they like on fuel? Thanks for the info!

