I purchased a 2009 Routan SEL/Premium with the Tow Prep package. The package consists of an enlarged transmission cooler, auto leveling suspension, and a wiring harness for a 4 pole trailer configuration (not installed, but in a bag in the rear compartment). The $600 wont get you the hitch/ball/etc.
So, I tow a 16x7 enclosed box trailer which has a 7 pole slotted connection. It's a tandem axle with electric brakes.
I had to have a class IV hitch (2" receiver) made by Drawtite put on, I liked this hitch because of the location for the safety chains and it has a rubber gasket going around the receiver opening which pads it against the underside of the bumper. I also had purchased a Tekonsha P3 electronic braking controller, and they also wired in the VW harness that was in the bag in the vehicle as part of the installation.
The total installation time was 3 hours (Franklin Trailer, Berlin, NJ) and the cost for the hitch/controller/labor/tax/etc. was slightly over 500 bucks. I did not need to buy the drawbar or ball since I had it from a 2006 Touareg V8.
Sure, I could have purchased the gear and done it myself, but this is what they do, and warrant the installation. For my configuration tapping into factory wiring harnesses isn't always the best case scenario. The new vehicles aren't like what they used to be (now I sound like my grandfather). These cars have many more controllers/modules to screw up if done wrong. I.E. The yellow wire will pop the airbag, and or ALL of the bags (which could actually be a "total" if you tried to repair it due to it destroying all of the interior body panels and airbag system, side, front, passenger, etc.etc. So, I stayed away; they did it and I'm happy.
But if you wanted to try and do it yourself, just put the hitch on, visit etrailer.com and they show a video on a 2009 Chrysler T&C (Ahem, yeah, we're driving a 2009 Chrysler Town & Country with some "German suspension" on it.) It's 6 bolts and the trickiest part is around the muffler. Wiring the lights is stupid easy. It's all plug & play but does require you to remove the rear tail lights and fish some wires across to the other tail light. Think "T" harness.
I've yet to tow anything on it. The car is a week old and I'm tinkering with the "MyGig" aka Joybox system. Yes, I've managed to install a NAVTV device for full time video, GPS while in motion and also rear view camera while in motion as well. It's awesome (I sell them, so PM me for pricing if you're interested)