Someone started a thread like this on another site and some interesting features were identified regarding the UConnect and Nav systems. So I am starting this thread to post some of those useful pieces of information, particuarly things not found in the manual...
UConnect feature: Press and hold for a couple seconds the center button on the back of the steering wheel on the left side. This will activate the UConnect similar to pressing the button on the rear-view mirror. Once this is activated, you can use the center button on the right side of the steering wheel similar to the second Uconnect button on the mirror. This seems to only stay active until you are done making a call, then the bottons revert to controlling the sound system.
Nav feature: Just like above, but this time press and hold the center button on the right side of the wheel. You will see a little steering wheel icon appear on the Nav screen (bottom right next to the clock) and the rear buttons now control the nav system, with the ability to scroll through menus and select destinations just using the steering wheel controls. I timed this and the controls will revert back to the default controls for the sound system after 30 seconds of non-use.
If you're having trouble with reception, check the position of the roof rack crossbars. The rear one will cause interference (signal cuts in and out) if it's too close to the antenna blister. (There is actually a TSB on this one.)
The aftermarket version of UConnect is not functionally equivalent to the factory-installed version. It has compatibility problems with many phones, especially recent models from Verizon. Some phones listed as "supported" on the UConnect web site do not actually work with the aftermarket version. Caveat emptor.
Thanks for the great information. I just got my 2006 Black Commander Limited a week ago and it is awesome. It had the UConnect option already installed now all I need is a bluetooth phone. Does anyone have any suggestions on a Sprint Bluetooth phone that works with the UConnect?
I am getting the factory installed GPS put in next week so I can't wait to try out the steering wheel features. I like how Jeep's have the audio controlls on the back of the steering wheel. It allows for a lot of functionality while keeping a less cluttered look. Thanks again for the tips!