I recently bought a a 2006 Jeep Grand Cherokee Limited. Whenever the headlights are on all the backlights, navigation screen and even the cabin lights will flicker between lighting levels. I took it to the dealer and they told me it was the auto-dimmer. The flickering is far to random to be part of the auto-dimmer. Any help would be appreciated so I can take it back to them with some ideas of what could be wrong. Thanks.