Yup, they reached the end of the road at Deadhorse, AK about 8pm local time on July 13.
The team made nice quality YouTube videos during the trip. They show scenery and details about the trip. See them here
http://www.tdi-panamericana.com/video.php
In one of the videos, they reveal how they were able to drive the TDI, which requires ultra-low sulfur diesel fuel, through countries that don't yet sell ULSD in service stations. The team pre-arranged fuel stops where they were met by a truck carrying barrels of the ULSD fuel. It takes about 20 minutes to fill up with about 100 gallons of fuel.
The support crew is from the Kuehne + Nagel Group, a German logistics company that is one of the TDI-Panamericana trip sponsors. They're the folks who arranged for the plane ride from Colombia to Panama, for example. They also meet the team at border crossings, providing items like proper insurance for the next country on the route.
Another video shows the Touareg getting service at the VW factory in Mexico, which is located a few miles south and east of Mexico City. The factory manufactures Jetta and New Beetle models for USA.
I wonder how the Touareg will return to Europe. Why not ship it to Vladivostok and drive the Road of Bones across Siberia?