The jeep Liberty was a 2 year marketing experiment in the US but VM diesel engines have been continuously available outside the US in Jeeps since 1992 Cherokees.
Anyone for a for a diesel powered Wrangler?
I have a 2006 Jeep liberty CRD (diesel) I bought new and used it for 5 years to tow our 17' SD. Towing MPG's were between 17-19 and I saw 20 MPG once
I filled up this morning and diesel was $2.99 and regular gas was $2.89, speculators are responsible for the big price differences we've been through.
Your profile does not indicate if you have a 16' or 17' SD But if it's the 17' SD your tongue weight
will be at or near 400#'s
Somewhere in the manual you will find it says that a WDH is REQUIRED
at 300#. Not recommended but required
If your Liberty has the factory installed tow package installing a brake controller is not too bad and you'll find the blue wire behind the driver's kick panel.
You will also find the spare tire is in the way but if you turn the bracket over it usually allows enough clearance
Now for the diesel engine and the RF545 transmission. The Chrysler factory torque converter was not properly setup for the diesel engine and problems resulted
Chrysler's bean counter fix was to de-rate the diesel engine when in 4th and 5th that are both overdrive gears and raise the shift points. The raised shift points are good for towing but the torque reduction in over drive gears is a real bummer
You'll be going along in 5th gear and come to a slight incline, the engine having reduced torque in OD will cause the transmission will downshift to 3rd gear, no torque reduction there and it will quickly shift back to overdrive and again fall
on it's face and down shift. In that situation the best remedy is to turn OD off and be happy at 50-55 mph in 3rd gear.
There are steps you can take to make your Liberty CRD the towing vehicle that it should be. Send me an email and I can tell you what needs to be done. That's unless the previous owner has already taken those steps