We have a mobile service appointment this week to fix two intermittent rattles. One is in the front driver's side area of the black fabric-covered speaker grill cover near the windshield, and a second rattle is intermittent in the passenger side C pillar cover, which I have worked on myself. Now that the weather is cooler, the dash rattle occurs less often. There's no question in my mind that the dash rattle will re-occur when the weather gets hot again. I placed six small pieces of sound-deadening foam in the small headliner gap of the C pillar. That rattle now occurs less often, but I know my fix is not ideal (although the foam is extremely hard to see unless I point them out to a passenger). My question is whether we should proceed with the repair of these rattles with the possibility that the repair might actually cause more rattles. I am aware that the dash rattle requires removing two other panels to allow removal of the dash speaker grill cover. We also have a panel gap issue between the passenger-side doors that is scheduled to be addressed at this appointment.