New member, thanks for the forum. 2000 ML 320 riving along and the interior dome lights come on, turn them off and they come on again; stop - get out - use key fob to lock - 20-30 sec later alarm goes off - unlock/lock okay; get home, park use key fob, lock and walk away and alarm goes off; I took out the alarm horn relay and fuse so the neighbors could sleep; took out the dome light bulbs and left the vehicle unlocked. Any ideas as to what is going on here? I did have a problem with the sunroof not closing all the way and used the manual crank to close it but that was a day before this so I can't imagine a link. Any ideas would be helpful. This is a new vehicle for us, we really like it.