Are you looking for new or used. Seems like fewer and fewer new automatics can be towed 4 down.
We got the new 2014 Jeep Cherokee. With 4WD and the Active Drive II option, it can be towed four down.
Only need to put the transfer case in neutral, then the transmission in park, and remove the key so is very quick to do. No battery issues, no limitation on speed or need to run engine every 6 hours, etc.
The dry weight is about 4300 lbs.
We have the Limited. There is also a Trailhawk with a 4wd Lo for heavy duty off roading. It is a very nice car to drive.
Susan