Car less than 6 months old, there is SO much rattling going on even on regular roads. Majority of it seems to be from the door panel assembly, door handles and near the seat belt holders. Anyone else having a lot of rattling noises in such a short period? Did any of you take it to the service center for this and get it resolved? I am seriously considering a fatmat layer inside the door panels, has anyone here done that with success and have positive experience with the same?