This was some recommendations that I received on another forum from a member with actual experience with my set up.
"I will repeat the Air Suspension information for the Grand Cherokee. Mine is a 2012 Overland. I suspect this information will also work for the newer ones, and for the half ton RAM trucks which are now using Air Suspension. I caution readers who are not familiar with this system that it is NOT the same as other air suspension systems you may have seen in the past. It is not a helper system, but replaces the springs and shocks totally and is integrated fully with the other computer driven systems in the GC.
First: find a dead level spot big enough for your TV and Trailer. Unhook the trailer, move the TV away a few feet. The dead level spot is critical as the Air Suspension system automatically tries to "look pretty" by adjusting the individual wheels to compensate for varying irregularity in the level of the parking spot. So, you need a level parking spot to start with. Let the rig idle for a few minutes allowing it to set it's level.
Second: Turn the Air Suspension system off (on the GC, press the up and down buttons at the same time for 10 seconds). Measure the fender heights above the ground and record. Back up to the trailer, raise the tongue and re couple, carefully dropping the tongue on the ball
Third: measure the fender well drop, then use your weight distribution hitch system to bring the fender measurements back to the original measurements, or as close as possible.
Forth: Drive away. The Air Suspension will automatically turn back on by itself in a short time.
Now, I would also advise checking your system by doing the same thing at a scale, only this time you can do before and after weights on all axels. I actually started by doing this at a closed Idaho Department of Transportation scale, which they leave on all the time and you can play to your heart's content. Once I was comfortable with the weights, I found that you can also rely on the fender measurement system to work quite well, that is the settings work out about the same, at least with my rig.
The Air Suspension system on the GC will hold the rear end of the rig high and level all by itself, even without a WD hitch system, but trust me, you will easily overload your rear axle and under load the front, if you don't follow the above system and don't use a WD hitch. It will look level and hold level, but that does not mean it is right and that the axels are not overloaded in the rear and underloaded in the front. Scale measurements will show that to be true.
I hope that helps some more.
For the record, I have done this with both an old round bar WD hitch setup and the Andersen. I use the Andersen now almost exclusively with excellent results. My tongue weights are in the 700# range on both of my 20' trailers."
Just Happy To Be Alive!