Mike,
I had the same issue not too long ago. I've got a vn s/wagon. After getting info from everywhere I found out mine can tow 1200kg as is without all the add ons. Just a transcooler.
The max I can tow with mine is 1590kg. It would need a 1590kg tow package including a equalizer hitch, side body bracing, trans cooler, elec. trailer brakes, country pack suspension. Also ball load can not exceed 160kg.
Might not be the same for you, but it might give you some idea as to what you may need. Hope it helps.
Rob