I am a full-time RVer and I recently bought a 2008 Liberty Sport 4x4 specifically to tow four wheels down behind my motorhome. I had been using a tow-dolly to tow a Nissan which I did NOT trade-in on the Jeep.
After reading the KK owner's manual I had some confusion and several questions. I put them to Jeep (Chrysler) customer assistance.
Facing the possibility of selling the Nissan but not selling the tow-dolly I wanted to know WHY the manual stated flat out that the Jeep could not be towed on a dolly even if the transfer case is in neutral. Made (makes) no sense to me. If the transfer case is in neutral then all wheels should be free-spinning and thus no harm would occur. I put the question in an email to Jeep Customer Assistance on Jeep.com About 6 days later a Chrysler rep called (left a message) clearly restating the "do not tow on dolly" but not explaining WHY. I have since sold both the dolly and the Nissan so the issue is moot for me.
The second concern was having to disconnect the negative terminal on the Jeep's battery while towing. I didn't have to do that with a 1995 Cherokee that I towed some years back. What a PIA to lift the hood and disconnect the battery - then lift the hood and reconnect the battery at the end!! So I started looking for a work around. In addition to a crude terminal mounted disconnect swith from NAPA, I found "Battery Brain" which has one model that works on a battery's negative terminal with a wired on/off switch that could be relocated to the interior. Still I wondered WHY I couldn't just pull a fuse or two (using an interior switch work around). In the same message mentioned above, the Chrysler rep stated that it was necessary to disconnect the battery to prevent the battery from draining while under tow.
UMMM why would the battery drain????
Back to the owner's manual. Page 13 illustrates four ignition key positions. They are LOCKED, ACC, ON and START. However, on page 391 under Recreation Towing instructions, item 12 says "Turn the key to the unlocked OFF position". WTF????????????
Well another email query to Jeep.com. However, by this time I have done a little thinking (dangerous) and I'm thinking that the only reason the key needs to be in the ignition at all is to UNLOCK steering lock. And since my vehicle doesn't have a locking steering column I see no reason the key needs to be in the ignition at all and thus nothing to drain the battery and thus no reason to disconnect the battery.
This time I'm in when the Chrysler rep calls. He says Chrysler acknowledges the confusion in the manual (to be corrected) and that the key should be in the ON position while the vehicle is being towed -- he did not know why. I pressed him about taking the key out altogether since my vehicle does not have steering lock since that was part of the question I had submitted. He did not have an answer (he was just a talking head not a technician or engineer). I pressed him more and he asked me to hold while he communicated with engineering.
Well turns out that sometime during the 2008 production year Jeep changed from steering lock to no steering lock on Liberty Sports and this part of the instruction applies to vehicles WITH steering lock but not to vehicles WITHOUT steering lock. He said engineering said as long as I do not have a locking steering column the key could be removed while towing. Of course the Chrysler rep declined to send me this via email.
So, I am going to take the key out and leave the battery connected while towing the KK.
Hope this has been entertaining if not informative.