In my 2011 WRX, I'm actually able to get to sedan/wagon/through mode by pressing 1+2, 1+3, 1+4 or 3+4, 3+5, 3+6 then pressing Tune. I can't tell much of a difference between the three. I think sedan mode is more distorted in terms of bass frequencies but I'm not sure. Either way, it sounds syrupy and crappy lol