2013 VW Touareg TDI Prep Package

[TBDub]

When I check VW website and look at the hitches they offer, every one includes a statement saying you must have the 1D6 trailer prep pkg before installing a hitch. My vehicle data sheet says the 1D8 trailer hitch prep pkg is installed. Want to know if any of the other VW, Audi or Porsche drivers know what pkg is required on the vehicle. Do I really need to have the 1D6 or dealer equivalent installed? I read in one thread that the 1D8 is all you need. Also are there any other options besides VW dealer installation?

I am planning on towing a 22 Ft. Bambi and looking at Weight Distribution Hitches.

Thanks,