Re: Cruise Control - Issues
The cruise control will not hit the brakes, it holds the speed with engine braking, but thats all it can do. You can try downshifting with the cruise engaged to see if that will help, but no non-adaptive cruise system will apply the brakes. Even adaptive cruise wouldn't in that situation I don't think.
I would recommend in steep descent situations coming out of cruise and taking over control of the speed yourself.
As to it cutting out, that happened on my 2011 twice and both times the switch assembly on the steering wheel was replaced. Obviously the assembly is different on the 2014s...
2015 Lexus LS460 AWD, Nebula Grey w/Light Grey Shimamoku Interior
2015 Kia Sedona SX-L, BlackBerry w/ Dark Burgundy Interior
Previous Jeeps: 2014 Grand Cherokee Overland; 2011 Grand Cherokee Laredo X