Air Conditioner problems of the 2011 Jeep Grand Cherokee

I was driving on the I 595 highway east bound at normal speed in motion, when suddenly my car began slowing down dramatically, I did the best I could quickly to get off on the shoulder, suddenly all of my electrical system voltage droped disabling my systems ,then I began feeling heat coming from the air conditioner and area's of the car I, quickly tried to open my windows but was unsuccessful to front windows , I quickly released my seatbelt to a ready to evacuate the car , I was frightened scared but happy the I didnt cause an accident to me and others. .

Initially, I took the car (2011 Jeep Grand Cherokee) to the dealer due to a rough idle, a shaking that had not occurred before. They dismissed it saying it was due to us running the air conditioning during the summer. I then ran the car with out the ac on and it still occurred. Next, the car began cranking and not starting. I looked up the symptoms on the internet and saw many others had problems with the Jeep/Chrysler tipm part. I took the car back to the dealer, described the problem, and asked them to look in to the tipm also as others were having the same problem. The diagnosed the problem as "two codes" that needed to be updated and not the tipm. Within 24 hours, the car did not start and cranked again. For the third time, I took the car to the dealer. They then reported it could either be the fuel pump or the tipm. ( I told them that was what I had asked for them to look at the last visit. ) they then determined it is the tipm, and the needed part will not be available until 9-25-13, leaving me car less until that time. My extended warranty only covers a 5 day rental and Chrysler has thus far refused to provide a rental until the part is received. Thank you.