Good friend tows his TJ Wrangler with his Sprinter Conversion and has no real issues. Takes some of the mountains slowly, but he gets everywhere he wants; this includes a number of trips into the mountains of Colorado. He has a brake controller for the TJ to help with the braking, which should be high on your list if you do it.
2001 34' Alpine Coach
2008 Jeep Rubicon or 2012 Ford F150 4x4 Lariat towds
or a couple of different trailers
Retired in Apple Valley, California