[11135i]

I've noticed that randomly, whenever the car unlocks (easy access), the gauge (speedometer, RPM, fuel temperature) needles all vibrate a bit, as if it's suddenly jolted awake by the electrical system. I've also noticed that something on the door, might either be the locking or window system, vibrates violently for a second and it's fairly loud, scaring the bejesus out of me. The second thing occurs maybe once a week while the gauge dancing occurs maybe 1 out of every 3 times when I unlock the door. Anyone know anything about this?