911 Mirror is plug and play you just need the correct wire harness that plugs in by the dash speaker on the right and runs up the pass. A pillar then across the headliner to the mirror.
You cant add factory front and rear park assist unless you're willing to drop $2K on wiring harnesses and strip the WHOLE truck wiring harness' and replace them. Then you would need to get the extension pig tails that run between the sensors and the chassis harness. Then you would need the 3 control boxes for the sensors, along with the control panel for under the radio that has the buttons to turn them off and on. Best bet would just get 2 sets of aftermarket sensors, or do a front and rear camera and run the customtronix software to enable them on the 8.4. You'll also have to grease alot of palms or have contacts at chrysler corporate to get them to add the sales codes for the sensors.
Fog light wires "should" run to the black body connector behind the driver headlight in the engine bay, but fuse may not be there. Believe there is a thread somewhere on here about adding factory fogs.
EDIT: Sliding rear window Follow Rick Ram's Info
Source: I'm the only person I believe that has added factory parking sensors to a truck that is a lower trim and didnt come with them...
