general problems of the 2009 Jeep Liberty

I have had my Jeep since it was new. In the beginning my radio would cut off or lock up and I hade it tested and nothing was found. Then my espoff, 4wd, service, 4 wd low light would come on and go off. I took it in and was not charged because noting showed up. But the mechanic said he had heard of others had the same complaint. Then while I was driving at night at approximately 65 mph I started to roll my window up and the lift gate light came on and all the lights inside the vehicle came on and I could not adjust or turn them off. This has happened now 3 times and it is a definite safety concern when all the lights and a vehicle comes on while driving at night.