Ford Explorer for towing

V10 Diesel Touareg weights 6,000 pounds Because of the heavier iron block engine upfront, it is front heavy. By adding 300 pounds to the back, it can have 50/50 balance front and back. What I mean by this is first 300 lb of the tongue weight actually makes my SUV achieve perfect balance. After adding two adults on front seat (400 pounds or so) and putting on additional 410 lb of tounge weight, I think my Touareg is pretty well balanced. Therefore, I don't think there is any need for WDH when each tires are getting more or less even load and tow vehicle and trailer are perfectly level.