Hi everyone, just bought a 2016 Touareg V6 FSI and also bought a 25 ft travel trailer. Picked up the trailer today. On paper everything checks out e.g. GVWR, GCVWR, towing capacity etc. However, when hooking up the trailer I experienced a 3,5 inch drop (sag) at the back of the Touareg. Have any of you experienced the same? The owners manual and plenty of online forums state clearly not the install a Weight Distribution system. I believe this will help with the sag, but have not installed one because of the warnings. Have any of you installed a WD system and if yes, what has your experience been like? Looking forward to some awesome adventures!