関連ワード:  2012 audi a4 common issues    2012 audi a4 known issues    2012 audi a4 quattro common problems    2012 audi a4 avant common problems    2012 audi a4 2.0 t common problems    2011 audi a4 common issues    2013 audi a4 common issues    2012 audi a5 common issues