Re: 2012 WK2: And the actual retail price is:
"5.7L Hemi engine with 4WD models $2,195.00 ($1,954.00) (includes Quadra-Drive II and Tow Group IV package)"
"Trailer Tow Group IV (requires 5.7L) ($695.00, included with 5.7L 4WD) ($619.00)"
Which means (I believe) that you must have the Overland 4x4 5.7L for the tow group IV to be included. You would need to pay for that option if you ordered a 2wd.