The latest issue of Truck Trend discusses three SUVs that were tested. All of them were Mercedes.
The Mercedes-Benz G63 Amg came in 1st place. The Mercedes-Benz GL63 Amg came in 2nd place, and the Mercedes-Benz ML63 Amg came in 3rd place. The cost for each of these vehicles is coincidentally in the same order. Curb weight happens to be in this order as well. The SUV in 2nd place has the most horsepower of the trio, considering all of the SUVs have 5.5L engines. All of the SUVs are currently sold in the United States.
There is a typo in this article in the latest issue (Nov/Dec 2013) of Truck Trend.
They explain that the Mercedes-Benz GL63 Amg has the most towing capacity of the three SUVs that were tested. They list this SUV to have 7500 lb towing capacity (est.), which is exactly what Mercedes' website says.
However, the towing capacity for the Mercedes-Benz G63 Amg is 7716 lbs. So the 1st place SUV is the one with the most towing capacity. Overall, the towing capacity is only 600 pounds maximum difference in the entire trio of Mercedes, so if you are up to buying a lightweight travel trailer, feel free to take a road trip if you end up buying one of these Mercedes SUVs.
In the neighborhood up near Virginia City that I used to live in, one of the people I used to carpool with had bought a Mercedes ML320 not long before some snow fell on the ground. Only two roads in the subdivision are paved, the rest of them are all washboard and gravel. So while this person drove his Mercedes, it handled quite well in the snow, and his maximum speed was the speed limit.
There are off-road driving schools that you can take your vehicle to and learn how to handle all these obstacles that come up on roads in the country (not just 4 wheeling). If you search "off road driving school" on Google, Yahoo or another search engine you will get several schools on the first page of results. I got a school in North Carolina, one in Southern CA, and one in New York. I have read previously about ones in Colorado.