One Question Jonmacs22 .... Can you give us a break down of your towing experience so we may all be enlightened as your advice appears to be totally at odds with the vehicle manufacturer.
1. it is amazing that Nick takes an opposing opinion so personally. It is as if I've kicked his puppy and stolen his lunch money all in one moment. It's ok to be wrong Nick. I've done it, and I'm sure you have too.
2. towing a boat is not the same as towing a race trailer. The trailer shown in the photo of the initial post is a totally different animal than a 6500lb boat + trailer.
3. 12% is the proper tongue weight for a standard tag race trailer with electric brakes. This is once again DIFFERENT (Nick) than a boat trailer with surge brakes.
4. My towing experience encompasses 9 years of towing track and race cars throughout the east coast. I've towed with all of the following vehciles (minimum of 5 times, others with less): 2001 F-250 PS, 2006 Duramax, 2008 Denali, 2008 Tundra, 2009 F-450. The trailers I've towed have been open steal, enclosed 24ft Pace, and enclosed 36ft goose. My 24ft Pace is pretty much the exact same trailer as the one shown in this thread (4k lbs unloaded and about 7500lbs with all gear + car) and if I had to venture a guess I've put somewhere in the neighborhood of 12k miles on it over the years.
5. As for the "magic ability to determine tongue weight" being as my trailer is pretty much the same and I've weighed it probably 6 times at various truck scales, I have a really good idea of what it will be. HOWEVER, regardless of what it is, the point of my comment was to show people that the 7700lb towing capacity is not to be followed as simply as they might think. The simple math shown depicts the reality of towing a race trailer where 12% is the proper tongue weight amount. At 12% and using the maxium allowable tongue weight (per VW), you arrive at the 6415 towing capacity. This is my point as 12% of 7000lbs is 840lbs.
6. Finally, I can tell you from experience that towing a trailer of this size with an SUV with a wheelbase of 114" (Touareg) without a weight-distribution AND anti-sway hitch would be a nightmare. I've done it with the bigger trucks I've towed with and never had a problem, but even on my Crewmax Tundra (146" wheelbase) it is still necessary to safely distribute and control the load.
If we want to debate towing safety, proper technique, or vehicle capabilities, I look forward to it. But just as I would never instruct someone on how to properly set up a boat trailer, I look forward to those with experience towing enclosed race trailers voicing meaningful concerns.
Jon