Like Rich.Dev we tow with a VW Touareg TDI. We have logged 10,000+ miles including mountains in North Carolina, Tennessee, and rally in Alabama. March and April were spent in southwest with drive out from Michigan to New Mexico and Arizona (Flagstaff area). Trip included Flagstaff to Sedona stretch which is 18 miles of 6% grade. Same experience as Rich, Touareg tows competently and brakes well. We also are limited with cargo capacity, so we stay mindful of that limit. I will say the road conditions in Flagstaff were horrendous with huge chunks of road missing on I-40 and I-17. Upon return home rear camber was off and I had to replace tires and have alignment done. I am planning a future upgrade to a 3/4 ton+ pickup truck for more flexibility. Happy travels!