I have a bad back and use my heated seats summer and winter and I get heat on my lower back up to about 6 to 8 inches--just guessing, but definitely heat on part of the lower back. My current KL does have the vented leather which of course I never use the vents for cool air. I also have a 2015 Jeep Patriot with heated leather and I do feel some heat on my lower back on it too--pretty sure it doesn't goes as high as the KL--will check and get back to you on both of them.
Didn't realize you are a new member--so welcome to the forum and a great question.
I checked my Patriot and it heats up on my back at least 10 to14 inches up and my KL seems to heat up the back up to where the lower panel is connected to an upper panel which is quite high. I have had several of these KLs and they all heated my back as far as I can remember.
2017 Trailhawk L Plus 4 bX4,Rhino exterior,Power 8 way drivers seat, Willys in windshidel,Cold Weather Group, Comfort/Convenience Group,Trailer Tow Group, 3.2 -Liter V6, Black Hood Decal , Uconnect 8.4 , Safety Tech Group, Leather Interior Group, Ventilated/Memory seat Group,Navigation. No hole in roof.
2017 KL Latitude-4 by 4 Cherry Red, V-6, Safety/Convenience group, Cold Weather Group,which includes heated front seats--love those heated seats,
Last edited by ptram; 01-09-2017 at 05:52 PM.