I have a 2004 Mini Cooper. I have the navigation option. After the car has warmed up, the lights above the navigation unit all flicker. Sometimes they will stop flickering and go out--but flicker when my turn signals are on. Even when the key is pulled out of the ignition, they stay on and flicker. Most sensors like door being left open or gas cap stopped working. What could this be?

I changed the battery and alternator like 3 months ago.

Help would be appreciated.