i used to work at audi artarmon... the amount of import brides who fill up diesel q7s with petrol is unfathomable. at 18k to fix, the husbands were never happy.
best tow rig I've used would be dads old cayenne turbo, but that was towing a 67 superbug with a stan pobjoy 1916cc in it.. so weighed less than ur dick but the aeros were quite horrendous.